Bicycle tire, in particular tubeless bicycle tire, use thereof, kit-of-parts comprising the bicycle tire, bicycle wheel comprising the bicycle tire, and method for producing the bicycle tire

Abstract

The invention relates to a bicycle tire, in particular a tubeless bicycle tire, comprising a tire carcass and a film, in particular a stretchable film, which bridges the region between the first and second rim bead, a portion of the stretchable film not connected to the inner face of the first and second lateral wall extending between the first connecting region end oriented towards the termination of the first rim bead and the second connecting region end oriented towards the termination of the second rim bead. The invention further relates to a bicycle wheel comprising the bicycle tire according to the invention and a bicycle rim, to a method for producing the bicycle tire according to the invention, to the use thereof for gravel bike and / or mountain bike wheels, and finally to a kit-of-parts, comprising A) a film strip, in particular a stretchable film strip, having an integrated valve foot and B) an adhesive.

Description

[0001] Bicycle tires, in particular tubeless bicycle tires, and their use, as well as kit-of-parts comprising the bicycle tire, a bicycle wheel comprising the bicycle tire, and a method for manufacturing the bicycle tire

[0002] Description

[0003] The present invention relates to a bicycle tire, in particular a tubeless bicycle tire, and its use, as well as a kit of parts comprising the bicycle tire and a bicycle rim. The invention further relates to a bicycle wheel comprising the bicycle tire, and a method for manufacturing the bicycle tire.

[0004] Bicycle tires are sometimes subjected to very high loads. This is true, for example, of e-bikes, which are typically built very robustly and therefore heavier, and also have a high moment of inertia even at low speeds due to their integrated batteries. Mountain bike tires also have to withstand very high mechanical loads, especially during descents over rough terrain. Mountain bike tires used in competitive downhill races are subjected to particularly high stress. These tires are deliberately run at relatively low pressures, for example in the range of 1.0 to 1.8 bar, to ensure excellent grip on the ground.Many mountain bikers, especially those who want to tackle challenging downhill sections, are increasingly using tubeless tires due to their more comfortable ride and safety features. However, handling tubeless tires is often not straightforward. Even during the initial inflation, suitable pumps must be used to quickly and effectively seat the tire beads against the rim, preventing air from escaping through the gap between the bead and the rim. To maintain the seal of tubeless tires over time, sealant (a water-based latex emulsion) must be added through the valve at regular intervals.For this, the tire must be completely deflated regularly, which can cause sealant to leak out through the gap between the rim bead and the rim flange during refilling. A particularly annoying problem, especially on challenging downhill sections when using tubeless tires, is the so-called "burping." The intense mechanical stress temporarily creates a small gap between the rim bead and the rim flange, through which air escapes, often resulting in the rider having to abandon the ride. This phenomenon occurs particularly frequently with rims or rim flanges that have dents or indentations due to mechanical damage.

[0005] German patent DE 102020 201474 B4 describes a bicycle tire with a tire carcass equipped with an air chamber layer that is partially separated from the tire carcass, such that an air chamber exists between the air chamber layer and the tire carcass. A separating layer must be arranged within the air chamber between the air chamber layer and the tire carcass. This separating layer between the air chamber layer and the tire carcass is intended to ensure a clear demarcation between the sections of the air chamber layer connected to the tire carcass and those sections separated from the inside of the tire carcass. The air chamber layer must initially be connected to the sidewalls of the tire carcass in the direction of the rolling surface before transitioning, adjacent to the rolling surface, into a section that can come into contact with the separating layer.

[0006] EP 3 511 181 Ai discloses a ring-shaped tire structure mounted on a rim, comprising a tire body, a flexible sealing element connected to the tire body in the form of a liner with a through-hole, and a nozzle. The nozzle, comprising a base with a screw hole and a valve stem with a mounting end and an inflation channel, is arranged on the flexible sealing element such that gas can enter an inflation chamber, and the mounting end of the valve stem is designed to be inserted into the screw hole. Finally, the inflation channel is designed to allow gas to pass through it. After insertion into the screw hole, the mounting end of the valve stem protrudes from the through-hole, thus connecting the inflation channel to the inflation chamber. The tire structure of EP 3 511 181 Ai is intended to effectively prevent clogging of the nozzle channel.

[0007] The present invention was based on the objective of making bicycle tires, in particular tubeless bicycle tires, available that are no longer subject to the disadvantages of the prior art and that, in particular, help to reduce or eliminate the risk of burping and that preferably also make the filling of sealant safe and uncomplicated. Furthermore, in a preferred embodiment, the invention was based on the objective of making bicycle tires, in particular tubeless bicycle tires, available whose sidewalls do not tend to leak even under high mechanical stress, especially when in contact with the rim flange.

[0008] Accordingly, a bicycle tire, in particular a tubeless bicycle tire, was found comprising a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead start and a rim bead end, and a second sidewall extending to a second rim bead with a rim bead start and a rim bead end, wherein the tire carcass has an outer side and an inner side, further comprising at least one, preferably stretchable, in particular reversibly stretchable, film bridging the area between the first and second rim beads, with an inner and an outer side, comprising a first, in particular circumferential, side edge section and an opposing second, in particular circumferential, side edge section.wherein the outer side of the first side edge section is adhesively connected at least partially to the inner side of the first sidewall in the area of ​​and / or beyond the first rim bead in a first connection area, and wherein the outer side of the second side edge section is adhesively connected at least partially to the inner side of the second sidewall in the area of ​​and / or beyond the second rim bead in a second connection area, wherein the first connection area extends in the direction of the beginning of the rolling surface, in particular up to a maximum of the first sidewall, and optionally beyond, and / or, in particular, and, wherein the second connection area extends in the direction of the beginning of the rolling surface, in particular up to a maximum of the second sidewall, and optionally beyond, wherein a section of the first and second sidewall not connected to the inner side ispreferably stretchable, in particular reversibly stretchable, film extends between the end of the first connection area aligned with the rim bead termination of the first rim bead and the end of the second connection area aligned with the rim bead termination of the second rim bead.

[0009] The section of the preferably stretchable, and in particular reversibly stretchable, film located between the first and second connection areas has a lateral extent that is smaller, equal to, or larger, preferably equal to or smaller than, and especially preferably equal to, the (clear) distance between the first and second rim beads without external force. This distance can be determined by placing the bicycle tire with its tread on a flat surface and aligning it so that its diameter, and in particular the circular area spanned by the bicycle tire, is perpendicular to the flat surface. To account for manufacturing inaccuracies, the aforementioned distance expediently, and in particular preferably, represents the average distance determined over the entire circumference of the bicycle tire.

[0010] Accordingly, the section of the preferably stretchable, and in particular reversibly stretchable, film located between the first and the second connection area preferably has a lateral extent that is equal to or less than the distance between the first and the second rim bead without external force, wherein the lateral extent is particularly preferably equal to the (clear) distance between the first and the second rim bead without external force.

[0011] In accordance with the invention, the given distance, which can also be described as the clear distance, between the first and second rim beads is expediently determined when the film, preferably stretchable, and in particular reversibly stretchable, is not yet connected to the inside of the tire carcass via the first and second connection areas. This is because if this connection were already present, an external force would be exerted on the film with a smaller distance.

[0012] A tubeless bicycle tire according to the invention is particularly preferred, comprising a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead start and a rim bead end, and a second sidewall extending to a second rim bead with a rim bead start and a rim bead end, wherein the tire carcass has an outer side and an inner side, further comprising at least one reversibly stretchable film bridging the area between the first and second rim beads, having an inner and an outer side, comprising a first circumferential side edge section and an opposing second circumferential side edge section, wherein the outer side of the first side edge section overlaps at least partially with the inner side of the first sidewall in the area of ​​the and / or, in particular, andbeyond the first rim bead is adhesively connected in a first connection area, and wherein the outer side of the second side edge section is at least partially adhesively connected to the inner side of the second side wall in the area of ​​and / or, in particular, beyond the second rim bead in a second connection area, wherein the first connection area extends in the direction of the beginning of the rolling surface, in particular up to a maximum of the beginning of the rolling surface, and optionally beyond, and wherein the second connection area extends in the direction of the beginning of the rolling surface, in particular up to a maximum of the beginning of the rolling surface, and optionally beyond,wherein a section of the reversibly stretchable film not connected to the inside of the first and second sidewalls extends between the end of the first connection area aligned with the rim bead termination of the first rim bead and the end of the second connection area aligned with the rim bead termination of the second rim bead, wherein preferably the section of the reversibly stretchable film lying between the first and the second connection area has a lateral extent that is equal to or less than, preferably equal to, the (clear) distance between the first and the second rim bead without external force.

[0013] In a suitable embodiment, the section of the film of the bicycle tire according to the invention, which is preferably stretchable, and in particular reversibly stretchable, located between the first and the second connection area, is formed in one piece.

[0014] In a particularly advantageous embodiment of the bicycle tire according to the invention, the section of the film, preferably stretchable, and in particular reversibly stretchable, located between the first and second connection areas is formed in multiple parts, particularly in two parts. It can be provided, in particular, that the two-part section of the film, preferably stretchable, and in particular reversibly stretchable, located between the first and second connection areas, is formed from a first film section adjoining the first, in particular circumferential, side edge section and a second film section adjoining the second, in particular circumferential, side edge section. In an advantageous embodiment, the first side edge section and the first film section form a first film strip section or are a component thereof.Additionally, it may be provided that the second side margin section and the second foil section form a second foil strip section or are part thereof.

[0015] In order to obtain a film, in a preferred embodiment it can be provided that the first film section and the second film section have an overlap area, in particular a circumferential one, and are connected to each other in this overlap area, in particular by gluing or welding.

[0016] Instead of overlapping the first and second foil sections or the first and second foil strip sections, it can also be provided that the first foil section and the second foil section abut each other at their respective edges, in particular all around, over their respective edge surfaces, wherein the first and the second foil section are connected to each other in the area of ​​the abutting edge surfaces, in particular by gluing or welding.

[0017] The film, preferably stretchable, and in particular reversibly stretchable, constitutes, in a further preferred embodiment, a circumferential, particularly annular, film strip. This preferred annular film strip can be manufactured in one piece, i.e., as a single unit, e.g., cut or punched from a film tube, or by bonding overlapping film ends of the film strip. The first-mentioned embodiment is preferred; the risk of leaks is even lower here.

[0018] A film is advantageously stretchable within the meaning of the invention if its length can be changed non-destructively when a force is applied. To be reversibly stretchable within the meaning of the invention, it is generally sufficient that the film shortens again when the stretching force is removed, without having to return to its original, shorter length, although the latter is preferred. For a number of applications, it is sufficient to use a stretchable film that is not elastically elastic. However, stretchable films that are elastically elastic, i.e., those that possess reversible flexibility, such as that known, for example, from the material from which bicycle inner tubes are regularly manufactured, are particularly advantageous.

[0019] In a particularly advantageous embodiment, the bicycle tire according to the invention further comprises a valve base (also known as a valve stem) which is integrated into the film, preferably stretchable, and in particular reversibly stretchable, preferably permanently connected, and most preferably vulcanized into the film. In suitable embodiments, the bicycle tire according to the invention is further equipped with a valve, which is preferably located in the valve base.

[0020] Such bicycle tires according to the invention have proven particularly advantageous in which the film, preferably stretchable, and in particular reversibly stretchable, does not extend beyond two-thirds of its length, and in particular not beyond half its length, of the first sidewall, measured from the rim bead end of the first rim bead to the rolling surface. Alternatively, and in particular additionally, it can be provided that the film, preferably stretchable, and in particular reversibly stretchable, does not extend beyond two-thirds of its length, and in particular not beyond half its length, of the second sidewall, measured from the second rim bead to the rolling surface.

[0021] Such bicycle tires according to the invention solve the problem underlying the invention particularly advantageously, in which the first connection area does not extend beyond two-thirds of the extent, and in particular not beyond half the extent, of the first sidewall, measured from the rim bead end of the first rim bead to the rolling surface, and / or, in particular, in which the second connection area does not extend beyond two-thirds of the extent, and in particular not beyond half the extent, of the second sidewall, measured from the rim bead end of the second to the rolling surface. In these embodiments, it is nevertheless possible for the film, preferably stretchable, and in particular reversibly stretchable, to extend beyond the first and / or, in particular, second connection area without being connected to the inside of the tire carcass.Accordingly, with the bicycle tire according to the invention, the film, preferably stretchable, and in particular reversibly stretchable, can extend in the direction of the rolling surface beyond the first and / or, in particular, the second connection area, without being connected to the inside of the tire carcass. The film, preferably stretchable, and in particular reversibly stretchable, can preferably extend beyond the first and / or, in particular, the second connection area to a extent that corresponds at most to the extent of the first or second connection area.The invention also allows for the section of the preferably stretchable, and in particular reversibly stretchable, film extending beyond the first connection area to merge seamlessly with the section of the preferably stretchable, and in particular reversibly stretchable, film extending beyond the second connection area, particularly forming a tube. These sections of the film, which are not connected to the tire carcass, can contribute to even greater protection, especially when the tire sidewall is crushed and pressed against the rim flange under heavy mechanical stress.

[0022] In other advantageous embodiments, it can be provided that the first connection area extends beyond the beginning of the rolling surface and that the second connection area also extends beyond the beginning of the rolling surface, wherein the first and second connection areas abut each other, overlap each other, or, in particular, merge seamlessly into one another in the area of ​​the inside of the tire carcass covered by the rolling surface. In the latter case, the film, preferably stretchable, and in particular reversibly stretchable, is advantageously in the form of a tube.

[0023] In a preferred embodiment of the bicycle tire according to the invention, the first connection area begins at the rim bead end or at the rim bead beginning of the first rim bead. Alternatively, and particularly additionally, the second connection area begins at the rim bead end or at the rim bead beginning of the second rim bead. It has often proven sufficient for the first connection area to begin in the region of the rim bead beginning, e.g., 2 to 10 mm, preferably 2 to 5 mm, on either side of the rim bead beginning, and preferably at the rim bead beginning of the first rim bead, and for the second connection area to begin in the region of the rim bead beginning, e.g., 2 to 10 mm, preferably 2 to 5 mm, on either side of the rim bead beginning, and preferably at the rim bead beginning of the second rim bead.A preferred embodiment is one in which the first connection area begins at the start of the first rim bead and the second connection area begins at the start of the second rim bead. If the foil strip is connected to the bicycle tire at the respective rim bead start or in the area of ​​the rim bead start, particularly by gluing, it can be reliably prevented that the rim flange, when the bicycle tire, especially the sidewall, is pressed against it under strong mechanical stress, causes damage that leads to leakage. Bicycle tires according to the invention have also proven to be particularly advantageous in which the section between the first and second connection areas, i.e.,The section of film that connects to the bonded areas on the side facing away from the rolling surface has a maximum extension. This film, preferably stretchable, and in particular reversibly stretchable, is designed and configured so that, without external force acting on the bicycle tire, and especially when unstretched, it does not extend beyond the junction of the first and second rim beads. In this design, this section of film extending between the bonded areas does not rest against the rim bed due to gravity, thus simplifying installation and repair. The width of the rim bed is typically in the range of 2.0 to 4.0 cm, and often around 3.0 cm for mountain bike tires.

[0024] Particularly satisfactory results can also be achieved with preferred embodiments of the bicycle tire according to the invention in which the film, preferably stretchable, and in particular reversibly stretchable, is thicker in the first and second connection areas than in the section of the film located between the first and second connection areas. These sections located in the connection area often contribute significantly to damping under high mechanical stress. Here, the film, preferably stretchable, and in particular reversibly stretchable, in the first and second connection areas can preferably have a thickness in the range of 0.1 to 3.0 mm, more preferably in the range of 0.1 to 2.0 mm, and most preferably from 0.1 to 1.5 mm.Alternatively, and especially additionally, the thickness in the section between the first and the second connection area is preferably in the range of 0.05 mm to less than 1.0 mm, for example in the range of 0.1 to 0.8 mm.

[0025] In this context, bicycle tires according to the invention have proven particularly suitable in which the film, preferably stretchable, and in particular reversibly stretchable, has a greater thickness in that section of the first connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the first rim bead, than in that section which does not belong to the first and optionally the second connection area. Alternatively, and in particular additionally, it can be provided that the film, preferably stretchable, and in particular reversibly stretchable, has a greater thickness in that section of the second connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the second rim bead, than in that section which does not belong to the second and optionally the first connection area.

[0026] In a further advantageous embodiment, the preferably stretchable, and in particular reversibly stretchable, film may be multilayered, and in particular double-layered, in that section of the first connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the first rim bead. Alternatively, and in particular additionally, it may be provided that the preferably stretchable, and in particular reversibly stretchable, film is multilayered, and in particular double-layered, in that section of the second connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the second rim bead. Here, the adjacent layers of the multilayer stretchable film are also connected to one another, e.g., by adhesive bonding.

[0027] In advantageous embodiments, the bicycle tire according to the invention further comprises a circumferential tread strip lying on the rolling surface.

[0028] The film of the bicycle tire according to the invention, which is preferably stretchable, and in particular reversibly stretchable, generally comprises or is formed from butyl rubber, polyurethane and / or polyamide.

[0029] In the bicycle tire according to the invention, in particularly suitable embodiments, at least one rim bead core is present in the first rim bead and in the second rim bead. This rim bead core can, in particular, comprise or consist of metal wire, aramid fibers, or carbon fibers. Using aramid fibers or carbon fibers allows for the creation of foldable bicycle tires according to the invention.

[0030] In particularly suitable embodiments of the bicycle tire according to the invention, the film, preferably stretchable, and in particular reversibly stretchable, does not extend to the outside of the tire carcass.

[0031] The bicycle tire according to the invention is in particular a mountain bike tire, especially a downhill mountain bike tire, as well as a gravel bike tire. In highly suitable embodiments, the bicycle tires according to the invention can also be bicycle tires, especially tubeless bicycle tires, for e-bikes. The object underlying the invention is further achieved by a kit of parts comprising a bicycle tire according to the invention and a bicycle rim with a rim bed and two opposing first and second rim flanges.

[0032] The problem underlying the invention is also solved by a bicycle wheel comprising a bicycle tire according to the invention and a bicycle rim with a rim bed and two opposing first and second rim flanges. It can also be provided that the bicycle tire contains sealant, in particular in the form of an aqueous latex emulsion, as well as optionally fibers and / or granules. Particularly in industrial series production of the bicycle wheels according to the invention, it can be provided that the fibers and / or granules are added to the bicycle tire before the film strip is applied. In this embodiment, the sealant can then be supplied via the valve stem, either also during industrial series production or at a later time by the user of the bicycle wheel.

[0033] Such bicycle wheels according to the invention are particularly preferred in which the first connection area of ​​the preferably stretchable, and in particular reversibly stretchable, film extends to the first rim flange or to beyond, preferably beyond, the first rim flange, and in particular not beyond the rim bead end of or adjacent to the first rim flange. Alternatively, and in particular additionally, it can be provided that the second connection area of ​​the preferably stretchable, and in particular reversibly stretchable, film extends to the second rim flange or to beyond, preferably beyond, the second rim flange, and in particular not beyond the rim bead end of or adjacent to the second rim flange.

[0034] The problem underlying the invention is further solved by a method for manufacturing a bicycle tire according to the invention, comprising the steps a) providing a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead end, and a second sidewall extending to a second rim bead with a rim bead end, wherein the tire carcass has an outer and an inner side, b) providing a film, preferably stretchable, in particular reversibly stretchable, preferably comprising a valve base, in particular inseparably connected to the film, with opposing first and second sidewall sections and with a longitudinal extent that essentially corresponds to the circumference of the tire carcass, in particular in the area of ​​the first and second rim beads,and in particular with a lateral extent that at most corresponds to the sum of the extent of the first and second sidewalls and the extent of the rolling surface substantially, c) circumferential adhesive bonding of the outside of the first sidewall section to the inside of the tire carcass in the area of ​​and / or beyond the first rim bead in a first bonding area, and circumferential adhesive bonding of the outside of the second sidewall section to the inside of the tire carcass in the area of ​​and / or beyond the second rim bead in a second bonding area, wherein the first bonding area preferably extends at most to the beginning of the rolling surface oriented towards the first sidewall and / or, in particular, and, wherein the second bonding area preferably extends at most to the beginning of the rolling surface oriented towards the second sidewall,wherein preferably the extension for the section of the preferably stretchable, in particular reversibly stretchable, film lying between the first and the second connection area is selected such that it corresponds to the (clear) distance between the first and the second rim bead given without external force, or is smaller or larger than this distance, preferably equal to or smaller than this distance, and particularly preferably equal to this distance.

[0035] A method according to the invention for manufacturing a bicycle tire according to the invention is particularly preferred, comprising the steps a) providing a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead end, and a second sidewall extending to a second rim bead with a rim bead end, wherein the tire carcass has an outer and an inner side, b) providing a reversibly stretchable film, preferably comprising a valve base, in particular inseparably, connected to the film, with opposing first and second side edge sections and with a longitudinal extent that essentially corresponds to the circumference of the tire carcass in the area of ​​the first and second rim beads, and in particular with a lateral extent,which corresponds substantially to the sum of the extent of the first and second sidewalls and the extent of the rolling surface, c) circumferential adhesive bonding of the outer side of the first sidewall section to the inner side of the tire carcass in the area of ​​and / or beyond the first rim bead in a first bonding area, and circumferential adhesive bonding of the outer side of the second sidewall section to the inner side of the tire carcass in the area of ​​and / or beyond the second rim bead in a second bonding area, wherein the first bonding area preferably extends to the beginning of the rolling surface oriented towards the first sidewall, and wherein the second bonding area preferably extends to the beginning of the rolling surface oriented towards the second sidewall.wherein preferably the extension for the section of the reversibly stretchable film lying between the first and the second connection area is chosen such that it corresponds to the (clear) distance between the first and the second rim bead given without external force or is smaller than this distance, preferably equal to this distance.

[0036] For the adhesive bonding in step c), cyanoacrylate adhesive can be used, for example.

[0037] The problem underlying the invention is also particularly advantageously solved by a method for manufacturing a bicycle tire according to the invention, comprising: a) providing a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead end, and a second sidewall extending to a second rim bead with a rim bead end, wherein the tire carcass has an outer and an inner side; b) providing a first, preferably stretchable, in particular reversibly stretchable, film strip section with opposing first and second side edge regions and with a longitudinal extent that essentially corresponds to the circumference of the tire carcass, in particular in the area of ​​the first and second rim beads, and a second, preferably stretchable,in particular reversibly stretchable film strip section with opposing first and second side edge areas and with a longitudinal extent that substantially corresponds to the circumference of the tire carcass, in particular in the area of ​​the first and second rim beads, in particular c) circumferential adhesive bonding of the outside of the first side edge area of ​​the first film strip section to the inside of the tire carcass in the area of ​​and / or beyond the first rim bead in a first bonding area, in particular using a cyanoacrylate adhesive, as well as circumferential adhesive bonding of the outside of the first side edge area of ​​the second film strip section to the inside of the tire carcass in the area of ​​and / or beyond the second rim bead in a second bonding area, in particular using a cyanoacrylate adhesive, d) overlapping, in particular circumferential overlapping,of the first and second film strip sections in the area of ​​their respective second side edge areas and, in particular, circumferential, adhesive joining of the first and second film strip sections in the overlap area, especially using a cyanoacrylate adhesive, wherein the first joining area preferably extends at most to the beginning of the unwinding surface oriented towards the first side wall and / or, in particular, and, wherein the second joining area preferably extends at most to the beginning of the unwinding surface oriented towards the second side wall.

[0038] In the methods described above according to the invention, it can be provided in particular that the section of the film, preferably stretchable, and in particular reversibly stretchable, located between the first and the second connection area has a lateral extent that is smaller, equal to, or larger, preferably equal to or smaller, than the distance between the first and the second rim bead without external force, wherein this given distance between the first and the second rim bead is determined when the film, preferably stretchable, is not yet connected to the inside of the tire carcass via the first and second connection areas, in particular by placing the bicycle tire with its tread on a flat surface and aligning the bicycle tire in such a way that its diameter, in particular the circular area spanned by the bicycle tire,is arranged perpendicular to the flat surface. In particular, it is intended that the distance represents the average distance determined over the rotating bicycle tire.

[0039] The bicycle tires according to the invention can be used in particular for mountain bike wheels, especially for downhill mountain bike wheels, as well as for gravel bike wheels, enduro wheels, all-mountain bike wheels and the like.

[0040] Finally, the problem underlying the invention is solved by a kit-of-parts comprising A) a preferably stretchable, in particular reversibly stretchable, preferably circumferential, particularly preferably annular, film strip, in particular according to one of the preceding sections, with a longitudinal extent that substantially corresponds to the circumference of a tire carcass, in particular in the area of ​​the first and second rim beads, and a lateral extent, wherein a valve base is preferably integrated, preferably inseparably connected, in particular preferably vulcanized in the film strip, and B) an adhesive, designed and configured to bond the film strip to the inside of a bicycle tire carcass.

[0041] The kit-of-parts according to the invention preferably further comprises C) a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead start and a rim bead end, and a second sidewall extending to a second rim bead with a rim bead start and a rim bead end, wherein the tire carcass has an outer and an inner side. A valve base is preferably integrated into the film strip of the kit-of-parts according to the invention, preferably permanently connected to it, and particularly preferably vulcanized therein. The film strip of the kit-of-parts according to the invention can be one-piece or multi-piece, in particular two-piece. If multi-piece or two-piece, it is particularly preferably in the form of two film strip sections or is formed from these.The kit-of-parts according to the invention enables individual private as well as commercial cyclists to convert their acquired or used generic, in particular tubeless, bicycle tires into a bicycle tire according to the invention and to benefit from the advantages described in this description.

[0042] The present invention brings with it the surprising insight that the bicycle tire according to the invention reliably maintains a constant air pressure in the air chamber of a tubeless bicycle tire according to the invention, regardless of whether the tire shifts on the rim or whether the rim has dents or other damage, e.g., due to mechanical stress. In other words, air loss is no longer a concern when the rim flange is deformed. In particular, air loss due to burping, especially during downhill riding, can be completely prevented. Furthermore, it has proven particularly advantageous that the sealant filled into the tire remains inside even after disassembly. This also prevents contamination of the rim by leaking sealant.Furthermore, a surprising advantage has emerged: the tire according to the invention can be easily mounted on a bicycle rim. In particular, with tubeless tires, it is no longer necessary to immediately inflate the tire to a high pressure to ensure that the rim bead is pressed against the rim flange. It has also proven surprisingly advantageous that, because the section of the stretchable film located between the first and second connecting sections is pressed against the rim bed when the tire is inflated, slippage or relative displacement of the tire on the rim can be prevented, for example, during abrupt braking or heavy mechanical stress in downhill races. This also ensures that the valve remains fixed in its original position.This effectively prevents leakage, a common problem with bicycle tires of this type. It has also proven advantageous, particularly for laypersons, that the bicycle tire according to the invention can be easily mounted and replaced. This applies especially to tubeless bicycle tires. A particularly significant advantage, especially with the tubeless version of the bicycle tire according to the invention, is that it can be ridden at very low pressures, e.g., in the range of 0.3 to 2.0 bar. These very low pressures contribute to increased riding safety, especially on demanding mountain bike trails. Furthermore, the bicycle tires according to the invention, particularly the tubeless tires, allow for easy fiber filling even during the industrial production process.This allows for even better sealing, especially of a tubeless bicycle tire, as well as improved sealing of punctures in combination with the use of sealant.

[0043] Further features and advantages of the invention will become apparent from the following description, in which preferred embodiments of the invention are explained by way of example with reference to schematic drawings. These drawings show:

[0044] Figure 1 shows a cross-section of the bicycle tire of a first embodiment of a bicycle tire according to the invention.

[0045] Figure 2 shows a cross-section of the bicycle tire of a second embodiment of a bicycle tire according to the invention.

[0046] Figure 3 shows a cross-section of the bicycle tire of a third embodiment of a bicycle tire according to the invention in a pre-final manufacturing stage and

[0047] Figure 4 shows a cross-section of the bicycle tire of the third embodiment of a bicycle tire according to the invention in the final manufacturing stage.

[0048] Figure i shows a cross-section of an embodiment of the bicycle tire according to the invention. The bicycle tire 1 shown comprises a tire carcass 2 with a rolling surface 4, an outer surface 22 and an inner surface 24, and, opposite each other, a first sidewall 6 extending to a first rim bead 10 with a rim bead start 12 and a rim bead end 14, and a second sidewall 8 extending to a second rim bead 16 with a rim bead start 18 and a rim bead end 20. The first rim bead 10 and the second rim bead 16 each have a rim bead core 44, 44*. Furthermore, the bicycle tire of Figure 1 comprises a film 26 bridging the area between the first and second rim beads 16, with an inner surface 30 and an outer surface 32.The film 26 further comprises a first side edge section 34 and an opposing second side edge section 36, wherein the outer surface 32 of the first side edge section 34 is adhesively connected to the inner surface 24 of the first side wall 6 beyond the first rim bead 10 in a first connection area A, and wherein the outer surface 32 of the second side edge section 36 is adhesively connected to the inner surface 24 of the second side wall 8 beyond the second rim bead 16 in a second connection area B. The film 26 further comprises a section that is not connected to the inner surface 24 of the first and second side walls 6, 8. This section extends between the end of the first connection area A oriented towards the rim bead end 14 of the first rim bead 10 and the end of the second connection area B oriented towards the rim bead end 20 of the second rim bead 16.The film also has an integrated valve base 42 in which a valve 46 is located.

[0049] The embodiment of the bicycle tire according to the invention shown in Figure 2 differs from the embodiment shown in Figure 1 in that the two side edge sections 34, 36 of the film 26 extend further towards the rolling surface 4, in the case shown, to approximately half the height of the cross-section of the bicycle tire 1. Furthermore, Figure 2 differs from the embodiment shown in Figure 1 in that the outer surface 32 of the first side edge section 34 is also adhesively connected to the inner surface 24 of the first sidewall 6 in the area of ​​the first rim bead 10, and in that the outer surface of the second side edge section 36 is adhesively connected to the inner surface 24 of the second sidewall 8 in the area of ​​the second rim bead 16. The connection areas A and B are thus significantly larger than those shown in Figure 1.

[0050] In the embodiments shown in Figures 1 and 2, the film 26 is bonded to the inside of the tire carcass 2 along the entire length of the connection areas A and B via the outer surface 32.

[0051] Furthermore, in the embodiments shown in Figures 1 and 2, the film 26 does not extend to the outer surface of the tire carcass. Additionally, in the embodiments shown in Figures 1 and 2, the section of the film 26 located between the first and second connection areas A, B has a maximum extent that, without external force acting on the bicycle tire, does not extend beyond the line connecting the first and second rim bead ends. In these embodiments, the film is preferably unstretched.

[0052] For many applications, the embodiment according to Figure 1 has proven to be particularly suitable and also preferable to the embodiment of Figure 2.

[0053] Figure 3 shows a cross-section of the bicycle tire 1 of a third embodiment of a bicycle tire according to the invention, wherein the stretchable film 26 in the section between the first connection area A and the second connection area B is in a pre-final manufacturing stage, i.e., unconnected. Specifically, a first film strip section 26A is present with opposing first and second side edge areas and with a longitudinal extent that essentially corresponds to the circumference of the tire carcass in the area of ​​the first and second rim beads. A second film strip section 26B is also present, with opposing first and second side edge areas and with a longitudinal extent that essentially corresponds to the circumference of the tire carcass in the area of ​​the first and second rim beads.The outer surface of the first side edge area of ​​the first film strip section 26A is bonded to the inner surface 24 of the tire carcass 2 in the area of ​​and beyond the first rim bead 10 in a first bonding area A. Furthermore, the outer surface of the first side edge area of ​​the second film strip section 26B is bonded to the inner surface 24 of the tire carcass 2 in the area of ​​and beyond the second rim bead 16 in a second bonding area B.

[0054] In Figure 4, the first and second film strip sections 26A and 26B are connected to each other in an overlap area 48. Specifically, the first and second film strip sections 26A and 26B overlap in the area of ​​their respective second side edge regions 50 and 52, respectively. In this way, the first and second film strip sections 26A and 26B, connected to each other around their circumference, form the stretchable film 26. In the illustrated embodiment, the first and second connection areas A and B, respectively, do not extend to the respective beginning of the rolling surface. The embodiment of a bicycle tire according to the invention shown in Figures 3 and 4 can be manufactured industrially in series particularly easily and cost-effectively, and preferably also essentially fully automatically.

[0055] The features of the invention disclosed in the foregoing description, in the claims and in the drawings can be essential for the realization of the invention in its various embodiments, both individually and in any combination.

[0056] Reference symbol list

[0057] 1 bicycle tire

[0058] 2 tire carcass

[0059] 4 Rolling surface

[0060] 6 first side wall

[0061] 8 second side wall

[0062] 10 first rim bead

[0063] 12. Rim bead start of the first rim bead

[0064] 14 Rim bead end of the first rim bead

[0065] 16 second rim bead

[0066] 18. Rim bead start of the second rim bead

[0067] 20 Rim bead end of the second rim bead

[0068] 22 Outer surface of the tire carcass

[0069] 24 Inside of the tire carcass

[0070] Slide 26

[0071] 26A first foil strip section

[0072] 26B second foil strip section

[0073] 30 Inside of the foil

[0074] 32 Outside of the foil

[0075] 34 first page margin section

[0076] 36 second side margin section

[0077] 42 Valve base

[0078] (44, 44') Sweeping bead core

[0079] 46 valve

[0080] 48 Overlap area

[0081] 50 second side margin area of ​​the first foil strip section 26A

[0082] 52 second side margin area of ​​the second foil strip section 26B

[0083] A first connection area

[0084] B second connection area

Claims

Claims 1. Bicycle tire, in particular tubeless bicycle tire, such as mountain bike or gravel bike tire, comprising a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead start and a rim bead end, and a second sidewall extending to a second rim bead with a rim bead start and a rim bead end, wherein the tire carcass has an outer side and an inner side, further comprising at least one, preferably stretchable, in particular reversibly stretchable, film bridging the area between the first and second rim beads, having an inner and an outer side, comprising a first, in particular circumferential, side edge section and an opposing second, in particular circumferential, side edge section.wherein the outer side of the first side edge section is adhesively connected at least partially to the inner side of the first sidewall in the area of ​​and / or beyond the first rim bead in a first connection area, and wherein the outer side of the second side edge section is adhesively connected at least partially to the inner side of the second sidewall in the area of ​​and / or beyond the second rim bead in a second connection area, wherein the first connection area extends in the direction of the beginning of the rolling surface, in particular up to a maximum of the first sidewall, and optionally beyond, and / or, in particular, and, wherein the second connection area extends in the direction of the beginning of the rolling surface, in particular up to a maximum of the second sidewall, and optionally beyond, wherein a section of the rolling surface not connected to the inner side of the first and second sidewalls,preferably stretchable, in particular reversibly stretchable, film extends between the end of the first connection area aligned with the rim bead end of the first rim bead and the end of the second connection area aligned with the rim bead end of the second rim bead.

2. Bicycle tire according to claim i, characterized in that The section of the film, preferably stretchable, and in particular reversibly stretchable, located between the first and second connection areas, has a lateral extent that is smaller, equal to, or larger, preferably equal to or smaller, than the distance between the first and second rim beads without external force, wherein this distance between the first and second rim beads is determined when the film, preferably stretchable, is not yet connected to the inside of the tire carcass via the first and second connection areas, by placing the bicycle tire with its tread on a flat surface and aligning the bicycle tire in such a way that its diameter, in particular the circular area spanned by the bicycle tire, is arranged perpendicular to the flat surface.

3. Bicycle tire according to claim 2, characterized in that the distance represents the average distance determined over the rotating bicycle tire.

4. Bicycle tire according to one of the preceding claims, characterized in that the section of the film, preferably stretchable, in particular reversibly stretchable, located between the first and the second connection area is one-piece or multi-part, in particular two-part.

5. Bicycle tire according to claim 4, characterized in that the two-part section located between the first and the second connection area comprises or is formed from a first film section adjoining the first, in particular circumferential, side edge section and a second film section adjoining the second, in particular circumferential, side edge section.

6. Bicycle tire according to claim 5, characterized in that the first film section and the second film section have an overlap area, in particular a circumferential one, and are connected to each other in this overlap area, in particular by gluing or welding. 7- Bicycle tire according to claim 5, characterized in that the first film section and the second film section abut each other at their respective edges, in particular circumferentially, over their respective edge surfaces, wherein the first and the second film section are connected to each other in the area of ​​the abutting edge surfaces, in particular by gluing or welding.

8. Bicycle tire according to one of claims 5 to 7, characterized in that the first side edge section and the first film section are part of or form a first film strip section and that the second side edge section and the second film section are part of or form a second film strip section.

9. Bicycle tire according to one of the preceding claims, further comprising a valve base which is integrated into the, preferably stretchable, in particular reversibly stretchable, film, preferably inseparably connected, particularly preferably vulcanized, and is present in the film, and optionally a valve, in particular present in the valve base.

10. Bicycle tire according to one of the preceding claims, characterized in that the first connection area, and in particular the preferably stretchable, in particular reversibly stretchable, film, does not extend beyond two-thirds of the extent, in particular not beyond half of the extent, of the first sidewall, calculated from the rim bead end of the first rim bead to the rolling surface, and / or, in particular, the second connection area, and in particular the preferably stretchable, in particular reversibly stretchable, film, does not extend beyond two-thirds of the extent, in particular not beyond half of the extent, of the second sidewall, calculated from the rim bead end of the second rim bead to the rolling surface.

11. Bicycle tire according to one of claims 1 to 9, characterized in that the first connection area extends beyond the beginning of the rolling surface and that the second connection area extends beyond the beginning of the extending beyond the rolling surface, wherein the first and second connection areas abut each other, overlap each other or, in particular, merge into each other in one piece within the area covered by the rolling surface.

12. Bicycle tire according to one of the preceding claims, characterized in that the first connection area begins at the rim bead end or at the rim bead beginning of the first rim bead and / or, in particular, that the second connection area begins at the rim bead end or at the rim bead beginning of the second rim bead, wherein preferably the first connection area begins at the rim bead beginning or in the area of ​​the rim bead beginning of the first rim bead and / or, in particular, wherein preferably the second connection area begins at the rim bead beginning or in the area of ​​the rim bead beginning of the second rim bead.

13. Bicycle tire according to one of the preceding claims, characterized in that the section of the film, preferably stretchable, and in particular reversibly stretchable, located between the first and second connection area has a maximum extension which is designed and arranged so that the film does not extend beyond the connection line of the first and second rim bead ends without external force acting on the bicycle tire and in particular in the unstretched state.

14. Bicycle tire according to one of the preceding claims, characterized in that the film, preferably stretchable, in particular reversibly stretchable, is thicker in the first and second connection areas than in the section between the first and the second connection areas, wherein the film, preferably stretchable, in particular reversibly stretchable, preferably has a thickness in the range of 0.1 to 3.0 mm, more preferably in the range of 0.1 to 2.0 mm and particularly preferably of 0.1 to 1.5 mm, and in the section between the first and the second connection areas preferably has a thickness in the range of 0.05 mm to less than 1.0 mm, and / or, in particular, and that the film, preferably stretchable, in particular reversibly stretchable, has a greater thickness in that section of the first connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the first rim bead, than in that section which does not belong to the first connection area, and / or, in particular, that the film, preferably stretchable, in particular reversibly stretchable, has a greater thickness in that section of the second connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the second rim bead, than in that section which does not belong to the second connection area, and / or, in particular, that the film, preferably stretchable, in particular reversibly stretchable, has a greater thickness in that section of the first connection area,which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the first rim bead, is multi-layered, in particular double-layered, and / or, in particular, that the film, preferably stretchable, in particular reversibly stretchable, is multi-layered, in particular double-layered, in that section of the second connection area which adjoins the beginning of the rim bead in the direction of the rolling surface or which begins with the beginning of the rim bead of the second rim bead.

15. Bicycle tire according to one of the preceding claims, characterized in that the film, preferably stretchable, in particular reversibly stretchable, comprises or is formed from butyl rubber, polyurethanes and / or polyamides.

16. Bicycle tire according to one of the preceding claims, characterized in that the film, preferably stretchable, in particular reversibly stretchable, extends in the direction of the rolling surface beyond the first and / or, in particular, the second connection area, without being connected to the inside of the tire carcass, wherein preferably the film, preferably stretchable, in particular reversibly stretchable, extends beyond the first and / or, in particular, the second connection area extending to an extent that corresponds at most to the extent of the first or second connection area, or wherein preferably the section of the film extending beyond the first connection area, preferably stretchable, in particular reversibly stretchable, and the section of the film extending beyond the second connection area, preferably stretchable, in particular reversibly stretchable, merge seamlessly into one another, in particular forming a tube.

17. Bicycle tire according to one of the preceding claims, characterized in that the film, preferably stretchable, in particular reversibly stretchable, does not extend to the outside of the tire carcass, in particular does not extend beyond the rim bead.

18. Bicycle tire according to one of the preceding claims, characterized in that the film, preferably stretchable, in particular reversibly stretchable, is a circumferential, in particular ring-shaped, film strip.

19. Bicycle tire according to claim 18, characterized in that the film strip is formed in one piece or from two overlapping first and second film strip sections connected to each other in the overlap area.

20. Bicycle wheel comprising a bicycle tire, in particular a tubeless bicycle tire, according to one of claims 1 to 19 and a bicycle rim with a rim bed and two opposing first and second rim flanges.

21. Bicycle wheel according to claim 20, characterized in that the first connection area of ​​the, preferably stretchable, in particular reversibly stretchable, film extends to the first rim flange or beyond the first rim flange and / or, in particular, that the second connection area of ​​the, preferably stretchable, in particular reversibly stretchable, film extends to the second rim flange or beyond the second rim flange.

22. Bicycle wheel according to claim 20 or 21, further comprising sealant present in the bicycle tire and optionally fibers and / or granules or fibers and / or granules present in the bicycle tire.

23. Method for manufacturing a bicycle tire, in particular a tubeless tire, according to any one of claims 1 to 19, comprising the steps a) providing a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead end, and a second sidewall extending to a second rim bead with a rim bead end, wherein the tire carcass has an outer side and an inner side, b) providing a film, preferably stretchable, in particular reversibly stretchable, preferably comprising a valve base, in particular inseparably connected to the film, with opposing first and second sidewall sections and with a longitudinal extent that substantially corresponds to the circumference of the tire carcass, in particular in the area of ​​the first and second rim beads,and in particular with a lateral extent that at most corresponds to the sum of the extent of the first and second sidewalls and the extent of the rolling surface, c) circumferential adhesive bonding of the outside of the first sidewall section to the inside of the tire carcass in the area of ​​and / or beyond the first rim bead in a first bonding area, in particular using a cyanoacrylate adhesive, and circumferential adhesive bonding of the outside of the second sidewall section to the inside of the tire carcass in the area of ​​and / or beyond the second rim bead in a second bonding area, in particular using a cyanoacrylate adhesive, wherein the first bonding area preferably extends at most to the beginning of the rolling surface oriented towards the first sidewall and / or, in particular, wherein the second connection area preferably extends to a maximum extent to the beginning of the rolling surface oriented towards the second side wall.

24. Method for manufacturing a bicycle tire, in particular a tubeless tire, according to any one of claims 1 to 19, in particular according to any one of claims 4 to 19, comprising the steps a) providing a tire carcass with a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead termination, and a second sidewall extending to a second rim bead with a rim bead termination, wherein the tire carcass has an outer side and an inner side, b) providing a first, preferably stretchable, in particular reversibly stretchable, film strip section with opposing first and second side edge regions and with a longitudinal extent that substantially corresponds to the circumference of the tire carcass, in particular in the region of the first and second rim beads, and a second,preferably stretchable, in particular reversibly stretchable, film strip section with opposing first and second side edge regions and with a longitudinal extent that substantially corresponds to the circumference of the tire carcass, in particular in the area of ​​the first and second rim beads, c) circumferential adhesive bonding of the outside of the first side edge region of the first film strip section to the inside of the tire carcass in the area of ​​and / or beyond the first rim bead in a first bonding area, in particular using a cyanoacrylate adhesive, as well as circumferential adhesive bonding of the outside of the first side edge region of the second film strip section to the inside of the tire carcass in the area of ​​and / or beyond the second rim bead in a second bonding area, in particular using a cyanoacrylate adhesive, d) overlapping,in particular circumferential overlapping of the first and second foil strip sections in the area of ​​their respective second side edge areas and, in particular, circumferential adhesive joining, of the first and second foil strip section in the overlap area, in particular using a cyanoacrylate adhesive, wherein the first joining area preferably extends to a maximum extent to the beginning of the unwinding surface oriented towards the first side wall and / or, in particular, and, wherein the second joining area preferably extends to a maximum extent to the beginning of the unwinding surface oriented towards the second side wall.

25. Method according to claim 23 or 24, characterized in that the section of the film, preferably stretchable, in particular reversibly stretchable, located between the first and the second connection area has a lateral extent that is smaller, equal to or larger, preferably equal to or smaller, than the distance between the first and the second rim bead given without external force, wherein this given distance between the first and the second rim bead is determined when the film, preferably stretchable, is not yet connected to the inside of the tire carcass via the first and second connection areas, in particular by placing the bicycle tire with its tread on a flat surface and aligning the bicycle tire in such a way that its diameter, in particular the circular area spanned by the bicycle tire, is arranged perpendicular to the flat surface.

26. Method according to claim 25, characterized in that the distance represents the average distance determined over the rotating bicycle tire.

27. Method according to one of claims 23 to 26, characterized in that a valve foot is connected to the first or second film strip section or preferably to the overlap area of ​​the first and second film strip section, in particular in a permanently connected manner.

28. Use of the bicycle tire according to one of claims 1 to 19 for gravel bike wheels and / or mountain bike wheels, in particular for downhill mountain bike wheels, or for e-bike wheels, in particular e-gravel bike wheels and / or e-mountain bike wheels. stretchable, preferably circumferential, particularly preferably annular, film strip, in particular according to one of claims 1 to 19, with a longitudinal extent that substantially corresponds to the circumference of a tire carcass, in particular in the area of ​​the first and second rim beads, and a lateral extent, and B) an adhesive, provided and designed to bond the film strip to the inside of a bicycle tire carcass, in particular a gravel bike wheel, mountain bike wheel or e-bike wheel such as an e-gravel bike wheel or an e-mountain bike wheel.

30. Kit-of-parts according to claim 29, further comprising C) a tire carcass comprising a rolling surface and, opposite each other, a first sidewall extending to a first rim bead with a rim bead start and a rim bead end, and a second sidewall extending to a second rim bead with a rim bead start and a rim bead end, wherein the tire carcass has an outside and an inside.

31. Kit-of-parts according to claim 29 or 30, characterized in that a valve base is integrated into the foil strip, preferably permanently connected, particularly preferably vulcanized in, 32. Kit-of-parts according to one of claims 29 to 31, characterized in that the foil strip is formed or can be formed in one piece or in multiple pieces, in particular in two parts, especially preferably in the form of two foil strip sections.

Images