71results about "Motorcycle tyres" patented technology

Provide is a technology in which a pneumatic tire for use as an on-road driving wheel has the water discharge efficiency enhanced without impairing the traction performance. Also provided is a pneumatic tire (100) for use as a driving wheel, including a tread having a directional pattern containing a plurality of width-direction grooves (11) and (12). Assuming that a half-width region of the tread, as measured from the tire equator (CL) to the tread-to-ground contact end (TE) along the surface of the tire in a cross section of the tread portion (1) in the width direction of the tire, is bisected into two regions that are referred to as the tread center portion (Tc) and the tread shoulder portion (Ts) respectively in this order from the tire equator (CL), the plurality of width-direction grooves (11) and (12) extend across the tread center portion (Tc), and have a pattern convex in the rotational direction of the tire.

A motorcycle tire (1) includes crown blocks (4) including first crown blocks (6) and second crown blocks (7). Each of the first crown blocks (6) has a heel-side edge (11) formed in a V-shape and inclined at an angle (α1) of 10 to 45 degrees on both axial sides with respect to the tire axial direction. A total number of the first crown blocks (6) is in the range from 30% to 70% of a total number of the crown blocks (4). Each of the second crown blocks (7) has a second ground contacting surface shape (7a) having a maximum length (WC) in the tire axial direction smaller than a maximum length (W1) in the tire axial of the first ground contacting surface shape (6a) of each of the first crown blocks (6).

The present invention relates to a tire for use on asphalt pavements having a tread surface (16) having a continuously smooth portion (20). The or each continuously smooth portion (20) has a plurality of recesses (26) and a plurality of protrusions (28). The recesses (26) and protrusions (28) are arranged such that, when the continuously smooth portion (20) runs over a road surface, the average protrusion crest pressure exerted, on average, by the road surface on the crests (32) of the protrusions (28) is strictly greater than the average recession base pressure exerted, on average, by the road surface on the bases (30) of the recesses (26).

Provided is a motorcycle tire capable of improving traction performance and suppressing a significant decrease in slip control performance during cornering. A motorcycle tire (1). A first crown block (6) has a V-shaped leading edge (11). The leading edge (11) is inclined at an angle (α1) of 10 to 45 degrees. The total number of the first crown blocks (6) is 30 to 70% of the total number of crown blocks (4). A second tread surface shape (7a) of a second crown block (7) has a maximum length (WC) in the tire axial direction that is smaller than a first tread surface shape (6a) of the first crown block (6).

The invention relates to an inflation valve for use with a tubeless tire, the inflation valve comprising a ball valve. The ball valve optionally includes a housing in which a ball is disposed, the ball forming a through-hole, the ball being rotatable between an open position in which air and / or sealant are permitted to flow through the through-hole and a closed position in which air and / or sealant are permitted to flow through the through-hole, the ball being rotatable between an open position in which air and / or sealant are permitted to flow through the through-hole and a closed position in which air and / or sealant are permitted to flow through the through-hole. Air and / or sealant are substantially prevented from flowing through the through-hole.

To provide a tire capable of realizing improvement of rigidity and reduction of noise.SOLUTION: A tire includes a tire body and a plurality of tread pattern structures. The tire body has a tread. The plurality of tread pattern structures each have a pattern block and one or more step-wise blocks. The pattern block has a forth tread part and a back tread part. The forth tread part goes in the revolving direction of the tire, and the back tread part goes in an opposite direction to the revolving direction of the tire. The step-wise block is connected to the back tread part of the pattern block, and has a height smaller than that of the pattern block. Due to the structure feature, the tire can improve rigidity of the tread, and stability at high-speed travel via the step-wise block, and simultaneously, reduce noise caused by abrasion of the tread.SELECTED DRAWING: Figure 1

A motorcycle tire (1) includes crown blocks (4) including first crown blocks (6) and second crown blocks (7). Each of the first crown blocks (6) has a heel-side edge (11) formed in a V-shape and inclined at an angle (α1) of 10 degrees or less on both axial sides with respect to the tire axial direction. A total number of the first crown blocks (6) is 30% or more of a total number of the crown blocks (4). A first ground contacting surface shape (6a) of each of the first crown blocks (6) has a maximum length (W1) in the tire axial direction from 60% to 70% of a tread width. Each of the second crown blocks (7) has a second ground contacting surface shape (7a) having a maximum length (WC) in the tire axial direction smaller than the maximum length (W1) of the first ground contacting surface shape (6a).

To provide a tire that can improve dry grip performance. [Solution] A tire having a tread portion, wherein the tread portion is composed of a rubber composition comprising a rubber component, a filler, and a plasticizer, the rubber component comprising styrene-butadiene rubber, the filler comprising carbon black, and the plasticizer comprising a resin component, wherein when the radius of curvature of the tread portion at the tire equator is R (mm) and the tanδ peak temperature of the rubber composition is T (°C), T is 25.0 or greater and R / T is less than 10.0.

A scooter is provided, including a wheel(s), a gas tank, and a pressure gauge. Each wheel includes a hub and a tire. The gas tank is disposed on the hub. The pressure gauge includes a pressure measurement assembly, a valve assembly, and a pressure control assembly. The pressure measurement assembly is connected with a lumen of the tire to detect a target pressure of air in the lumen. The valve assembly is connected with the lumen and the gas tank and includes a second gas channel. The pressure control assembly is electrically connected with the pressure measurement assembly and the valve assembly, is in communication connection with a control unit of the scooter, and is configured to periodically transmit the target pressure to the control unit and control the valve assembly to open or close the second gas channel based on a target instruction sent by the control unit.

Provided is a technology for inhibiting the occurrence of uneven wear at shoulder-side edges of blocks in a motorcycle tire having a block pattern. A motorcycle tire (100) includes plural blocks (11) and (12) that are arranged on a tread ground-contact surface. In a tire widthwise cross-section of a tread portion (1), when regions obtained by bisecting a tread half-width region measured along the tire surface from a tire equator CL to a tread ground-contact end TE are each defined as a tread center portion Tc and a tread shoulder portion Ts, a middle block (12) among the plural blocks, whose outer wall surface (12A) on the tire width-direction outer side is positioned in the tread shoulder portion Ts, is configured such that an upper end portion is chamfered only for the outer wall surface (12A) and a chamfered part (12B) is thereby formed on the middle block (12).

Tire whose tread is formed entirely or partially of a unit-molded composite material. The present invention relates to a tire (10) comprising a tread (15), said tread comprising a main composite material (30) which is of unit-molded construction and which comprises a thermoplastic polymer matrix and a textile reinforcement assembly. The present invention also relates to a method for manufacturing such a tire comprising the thermocompression of a multilayer assembly including a heat-fusible textile portion and a non-heat-fusible textile portion. Figure for the abstract: Fig. 1.

To provide a two-wheeled motor vehicle tire where straight line stability at high-speed traveling is compatible with turning performance.SOLUTION: A two-wheeled motor vehicle tire 1 includes a tread reinforcement layer 7. The tread reinforcement layer 7 includes a belt layer 8 and a band layer 9. The band layer 9 includes a band ply 9A where band codes 9A are arrayed at an angle θ1 relative to a tire circumferential direction. The belt layer 8 includes: an inner side belt ply 8A which is arranged so as not to overlap with the band ply 9A at both sides of the band ply 9A in a tire axial direction; and an outer side belt ply 8B which is arranged so as to overlap with the band ply 9A outside of the band ply 9A in a tire radial direction. The inner side belt ply 8A includes an inner side belt cord 8a which is arrayed at an angle θ2 different from the angle θ1 relative to the tire circumferential direction, and the outer side belt ply 8B includes an outer side belt cord 8b which is arrayed at an angle θ3 different from the angle θ1 and the angle θ2 relative to the tire circumferential direction.SELECTED DRAWING: Figure 1

A motorcycle tire 1 comprises a tread portion 2 provided with a belt layer 7 and a radially outer band layer 8. The belt layer 7 comprises a first belt ply 11 on a carcass 6 and a second belt ply 12 thereon. The band layer is made of a spirally wound band cord and has a developed width smaller than that of the belt layer. In a meridian cross-section of the tire mounted on a standard wheel rim at an internal pressure of 10 kPa: the radius of curvature Rc of the ground contacting surface of the tire in its crown region is less than 95% of the cross-sectional width of the tire; and the radius of curvature Rc is smaller than a radius of curvature Rb of the ground contacting surface in shoulder regions.

To provide a two-wheel automobile tire pair which can improve turning performance of a vehicle.SOLUTION: A tire pair comprises a front tire 2 and a rear tire. A center arc index Ac, a middle arc index Am and a shoulder arc index As are obtained based on a contour line TLf of a tread surface 16 of the front tire 2 and a contour line of a tread surface of the rear tire. In the tire pair, the middle arc index Am is larger than the center arc index Ac, and the shoulder arc index As is larger than the middle arc index Am.SELECTED DRAWING: Figure 3

This invention relates to an inflation valve for use with a tubeless tyre, the inflation valve comprising a ball valve. The ball valve optionally comprises a housing within which is provided a ball, the ball being formed with a through-hole, the ball being rotatable between an open position in which air and / or sealant is allowed to flow through the through-hole, and a closed position in which air and / or sealant is substantially prevented from flowing through the through-hole.

To provide a tire that can improve grip performance when driving on uneven terrain. [Solution] A tire having a plurality of blocks on the tread portion, wherein the tread portion is made of a rubber composition containing rubber components, the land ratio of the tread portion is L (%), the tanδ of the rubber composition at 70°C is 70°Ctanδ, and the modulus of the rubber composition at 300% stretch at 75°C is 75°CM 300 When expressed as (MPa), L is less than 30 and 75℃M 300 The ratio is 5.0 or higher, and L, 70°C tanδ, and 75°C M 300 A tire that satisfies the following equation (1). (L 0.5 ×70℃ tanδ) / 75℃ M 300 ≥0.13 ···(1)

A tyre for vehicle wheels comprises a tread band including a plurality of blocks and grooves that define in the tread band a void / solid ratio comprised between 0.4 and 0.65 and that form a tread pattern which is symmetrical with respect to an equatorial plane (X-X) of the tyre. The tread pattern includes a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane and which define in the tread band a central annular portion and a pair of lateral annular portions arranged on opposite sides with respect to said central annular portion. The central annular portion comprises a plurality of circumferentially consecutive central blocks (30, 60) arranged astride of the equatorial plane and having a maximum width equal to, or greater than, 50% of a radial section maximum width of the tyre. The central blocks (30, 60) are separated from one another by a respective central transversal groove (45, 50) having a circumferential length less than that of a circumferentially adjacent central block (30, 60). Each central block (30, 60) comprises opposite circumferentially outer faces (32, 62) having an axially central portion (32a, 62a) perpendicular to the equatorial plane and opposite axially outer portions (32b, 62b) inclined with respect to a plane orthogonal to the equatorial plane by a predetermined angle different from 90°. Each lateral annular portion comprises a plurality of circumferentially consecutive lateral blocks (80, 90) separated from one another by a respective lateral transversal groove (85, 95).

A tyre for vehicle wheels comprises a tread band including a plurality of blocks and grooves that define in the tread band a void / solid ratio comprised between 0.4 and 0.65 and that form a tread pattern which is symmetrical with respect to an equatorial plane (X-X) of the tyre. The tread pattern includes a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane and which define in the tread band a central annular portion and a pair of lateral annular portions arranged on opposite sides with respect to said central annular portion. The central annular portion comprises a plurality of circumferentially consecutive central blocks (30, 60) arranged astride of the equatorial plane and having a maximum width equal to, or greater than, 50% of a radial section maximum width of the tyre. The central blocks (30, 60) are separated from one another by a respective central transversal groove (45, 50) having a circumferential length less than that of a circumferentially adjacent central block (30, 60). Each central block (30, 60) comprises opposite axially outer faces (35, 65) inclined with respect to the equatorial plane by a predetermined angle. The axially outer faces (35) of a central block (30) are inclined with respect to a plane perpendicular to the equatorial plane on opposite sides with respect to the axially outer faces (65) of a circumferentially consecutive central block (60). Each lateral annular portion comprises a plurality of circumferentially consecutive lateral blocks (80, 90) separated from one another by a respective lateral transversal groove (85, 95).

The present application provides a scooter including a wheel(s), a gas tank, and a pressure gauge. Each wheel includes a hub and a tire. The gas tank is disposed on the hub. The pressure gauge includes a pressure measurement assembly, a valve assembly, and a pressure control assembly. The pressure measurement assembly is connected with a lumen of the tire to detect a target pressure of air in the lumen. The valve assembly is connected with the lumen and the gas tank. The valve assembly includes a second gas channel. The pressure control assembly is electrically connected with the pressure measurement assembly and the valve assembly, is in communication connection with a control unit of the scooter, and is configured to periodically transmit the target pressure to the control unit and control the valve assembly to open or close the second gas channel based on a target instruction sent by the control unit. The control unit is disposed on the scooter, is in communication connection with the pressure control assembly, and is configured to receive the target pressure and send the target instruction to the valve assembly based on the target pressure.

A motorcycle tyre, comprising a radial carcass structure (2) and a tread band (8) applied at a radially outer position with respect to the radial carcass structure (2), wherein the radial carcass structure (2) comprises a first carcass ply (3a) and a second carcass ply (3b) including a first plurality of textile reinforcing cords (30) and a second plurality of textile reinforcing cords (32), respectively, wherein the first textile reinforcing cords (31) are parallel to each other and the second textile reinforcing cords (33) are parallel to each other and have a respective first and second inclination at a crown portion (8c) of the tread band (8) with respect to an equatorial plane (X-X) of the tyre, wherein said second inclination is opposite to said first inclination. The first textile reinforcing cords (31) and the second textile reinforcing cords (33) have a tenacity comprised between 0.35 cN / Tex and 1.2 cN / Tex at 2% elongation and comprised between 0.5 cN / Tex and 3 cN / Tex at 5% elongation. At least one central annular sector (8a) of the tread band (8) arranged astride of the equatorial plane (X-X) is made of a vulcanized elastomeric material having a static elastic modulus Ca3 measured at 70°C comprised between 9.0 and 14.0, a tandelta measured at 70°C and 10Hz comprised between 0.120 and 0.160, and a dynamic elastic modulus E' measured at 70°C and 10Hz comprised between 3.7 and 4.1.

A tire for use on an asphalted surface comprises a tread surface (16) comprising a continuously-smooth part (20). The or each continuously-smooth part (20) comprises a plurality of recessed portions (26) and a plurality of raised portions (28). The recessed portions (26) and the raised portions (28) are arranged in such a way that, when the continuously-smooth part (20) rolls along a surface, the mean top-of-raised-portion pressure exerted on average by that surface on the tops (32) of the raised portions (28) is strictly greater than the mean bottom-of-recessed-portion pressure exerted on average by that surface on the bottoms (30) of the recessed portions (26).

This invention relates to thermoplastic polyurethanes in racing tire compositions. In one aspect, this disclosure relates to a composition comprising: one or more thermoplastic polyurethanes at a certain concentration; and one or more solution-polymerized styrene-butadiene rubbers at a concentration of at least 75 parts (phr) per 100 parts of rubber. Tires comprising the disclosed compositions are also disclosed herein. This abstract is intended as a scanning tool for searching in a particular field and is not intended to limit this disclosure.

An object of the present disclosure is to provide a tire for two-wheeled vehicles having excellent gripping performance without impairing cornering stability. In order to solve the above problem, the present disclosure provides a tire for two-wheeled vehicles including a pair of bead portions and a pair of sidewall portions, and a tread portion continuous with both of the sidewall portions. The tread portion is divided into five sections on a tread portion surface in a tire width direction, the five sections including a center portion including a tire equatorial plane, a pair of edge portions each including a tread edge, and a pair of traction portions each disposed between the center portion and the edge portion. The storage modulus E' at 60°C of a center rubber constituting the center portion, a traction rubber constituting the traction portion, and an edge rubber constituting the edge portion satisfies the following formulae (1) and (2): E' of the center rubber > E' of the edge rubber > E' of the traction rubber ... (1), and E' of the edge rubber > an average value of E' of the center rubber and E' of the traction rubber ... (2).

To provide a tire for a motor cycle which can additionally decrease tire noise.SOLUTION: A tire 1 for a motor cycle includes a tread part 2. A crown block row 3R is arranged on a tire equator C of the tread part 2. Separation distance in a tire circumferential direction between adjacent crown blocks 3 in the tire circumferential direction includes a first distance La1 and a second distance La2 different from the first distance La1. A centroid 3c of a tread 3a of the crown block 3 is arranged at a position separated from the tire equator C as far as a distance Lb in the tire axial direction.SELECTED DRAWING: Figure 1

A motorcycle tire can include a tread portion, sidewall portions, bead portions, and a carcass. The tread portion can include a tread reinforcing layer and a tread rubber. The tread reinforcing layer can include a belt layer and a band layer. A development width of the band layer can be smaller than that of the belt layer. The tread rubber can include a crown rubber and shoulder rubbers. A hardness at 100° C. of each shoulder rubber can be higher than a hardness at 100° C. of the crown rubber, a complex elastic modulus at 100° C. of each shoulder rubber can be higher than a complex elastic modulus at 100° C. of the crown rubber, and a 300% modulus at 100° C. of each shoulder rubber can be higher than a 300% modulus at 100° C. of the crown rubber.

The invention relates to a tyre for asphalted surfaces comprising a tread surface (16) having a continuously smooth part (20). The or each continuously smooth part (20) comprises a plurality of recessed portions (26) and a plurality of raised portions (28). The recessed portions (26) and the raised portions (28) are arranged in such a way that when the continuously smooth part (20) runs over the ground, the mean top-of-raised-portion pressure exerted on average by the ground on the tops (32) of the raised portions (28) is strictly greater than the mean bottom-of-recessed-portion pressure exerted on average by the ground on the bottoms (30) of the recessed portions (26).

Provided is a tire comprising a tread part provided with a plurality of blocks, wherein the tread part is composed of a rubber composition comprising a rubber component, and wherein L is less than 30, 75°C M300 is 5.0 or more, and L, 70°C tan δ, and 75°C M300 satisfy the following inequality (1): L0.5×70°Ctanδ / 75°CM300≥0.13 where L represents a land ratio, in %, of the tread part, 70°C tan δ represents a tan δ at 70°C of the rubber composition, and 75°C M300 represents a modulus, in MPa, at 300% elongation at 75°C of the rubber composition.

A motorcycle tyre, comprising a radial carcass structure (2) and a tread band (8) applied at a radially outer position with respect to the radial carcass structure (2), wherein the radial carcass structure (2) comprises a first carcass ply (3a) and a second carcass ply (3b) including a first plurality of textile reinforcing cords (30) and a second plurality of textile reinforcing cords (32), respectively, wherein the first textile reinforcing cords (31) are parallel to each other and the second textile reinforcing cords (33) are parallel to each other and have a respective first and second inclination at a crown portion (8c) of the tread band (8) with respect to an equatorial plane (X-X) of the tyre, wherein said second inclination is opposite to said first inclination. The first textile reinforcing cords (31) and the second textile reinforcing cords (33) have a tenacity comprised between 0.35 cN / Tex and 1.2 cN / Tex at 2% elongation and comprised between 0.5 cN / Tex and 3 cN / Tex at 5% elongation. At least one central annular sector (8a) of the tread band (8) arranged astride of the equatorial plane (X-X) is made of a vulcanized elastomeric material having a static elastic modulus Ca3 measured at 70° C. comprised between 9.0 and 14.0, a tandelta measured at 70° C. and 10 Hz comprised between 0.120 and 0.160, and a dynamic elastic modulus F measured at 70° C. and 10 Hz comprised between 3.7 and 4.1.

To provide a motorcycle tire capable of achieving both turning performance and durability performance.SOLUTION: A motorcycle tire 1 includes a carcass 6 and a tread reinforcement layer 7 arranged outside in a tire radial direction of the carcass 6 in a tread part 2. The tread reinforcement layer 7 includes: a belt layer 8 where a plurality of belt cords 8a are arranged; and a band layer 9 where a plurality of band cords 9a are arranged. The belt layer 8 is composed of one inside belt ply 8A arranged in adjacency to the carcass 6; and one outside belt ply 8B arranged outside in the tire radial direction of the inside belt ply 8A. The band layer 9 is composed of at least one band ply 9A arranged adjacent to the inner belt ply 8A and the outside belt ply 8B between the inner belt ply 8A and the outside belt ply 8B in a tire radial direction. A development width W1 of the outside belt ply 8B is larger than a development width W2 of the inside belt ply 8A.SELECTED DRAWING: Figure 1

The invention relates to a pneumatic tyre (1) for a two-wheeled vehicle, comprising a tyre tread (2), a tyre carcass, tyre sidewalls (3) and two bead regions (4) which each have a tyre bead having a core (5), wherein the two bead regions (4) each have a bead protection band (8) which is arranged axially outside the carcass as abrasion protection, wherein: • the tyre carcass is formed from a first carcass ply (6) and a second carcass ply (6') which each comprise reinforcements; • the second carcass ply (6') is arranged radially inside the first carcass ply (6) in a zenith (17) of the pneumatic tyre (1) for a two-wheeled vehicle and extends from the zenith (17) of the pneumatic tyre (1) for a two-wheeled vehicle over the tyre sidewalls (3) into both bead regions (4) and there wraps around each core (5) from axially inside to axially outside and ends in a second carcass ply end (7') under the bead protection band (8) of each bead region (4); • the first carcass ply (6) extends from the zenith (17) of the pneumatic tyre (1) for a two-wheeled vehicle over the tyre sidewalls (3) into the bead regions (4) and there wraps around each core (5) from axially inside to axially outside; • the first carcass ply (6) is guided from each bead region (4) in a carcass ply turn-up (61) over each tyre sidewall (3) and under the tyre tread (2); and • the two carcass ply turn-ups (61) overlap one another in the zenith (17) of the tyre (1), wherein the carcass ply turn-ups (61) extend over the zenith (17) and the tyre sidewalls (3) into both bead regions (4) and there end under the bead protection band (8) in a first carcass ply end (7).