200 results about "Motorcycle tyre" patented technology

Pairs of motorcycle tires and a method for improving performance and resistance to wearing, consists of a tread including grooves, the tread consisting of a central area, sided by intermediate side areas and by projection areas, the latter being adjacent to the external borders of such tread. The sea / land ratio in the central area of the front tire is between 15% and 30%; the sea / land ratio in such central area of the rear tire is substantially lower than that of the other areas of the tire, the value being lower than 70%; the sea / land ratio in the intermediate side areas of the front tire and rear tire is between 20% and 40%; and the sea / land ratio in the projection areas of the front tire and rear tire is between 10% and 30%.

A pair of motorcycle tires includes front and rear tires. The front tire's tread band includes at least one circumferential groove and a plurality of transverse grooves. The at least one circumferential groove extends at an equatorial plane of the front tire within a central zone of the tread band. The transverse grooves include axially inner ends lying within the central zone that alternately extend from the central zone toward axially opposite shoulder zones. At least some of the transverse grooves are connected to the at least one circumferential groove. The rear tire's tread band includes an area defining a substantially null sea / land ratio within a central zone of the tread band. The central zone of the rear tire's tread band has a width greater than or equal to about 5% and less than or equal to about 30% of an axial development of the rear tire's tread band.

According to one aspect of the present invention, a new and improved motorcycle tire is provided which comprises a pair of beads, a carcass extending between the beads, a tread disposed outwardly of the carcass where the tread has tread edges. The tire further comprises a pair of sidewalls extending from the tread edges to the respective beads. The tread further includes a first rubber composition having a working temperature and a second rubber composition having a working temperature, wherein the first rubber composition reaches its working temperature faster than the second rubber composition reaches its working temperature. The first rubber composition and the second rubber composition are adapted to contact an associated underlying surface. The combination of the first rubber composition and the second rubber composition provides more even wear across the tire tread in order to increase the life of a tire and provide better tire performance.

A tire pressure monitoring system for a motorcycle includes a tire valve stem mounted tire pressure gauge and an externally powerable remote display unit. The pressure gauge includes a pressure sensor, a wake circuit, a processor, and a first radio frequency (RF) module. The remote display unit includes a second RF module and a display. The wake circuit is adapted to activate the processor periodically at a predetermined interval of time and causes the processor to receive an output signal from the pressure sensor. The output of the pressure sensor is indicative of a tire pressure detected by the pressure sensor. The remote display unit is adapted to display the measured tire pressure value without any user input.

A tire (2) for a motorcycle includes a tread (4). The tread (4) has a center region (18), a pair of shoulder regions (20) and a pair of middle regions (22). In straight running, the center region (18) mainly comes in contact with a road surface. In cornering, the shoulder region (20) mainly comes in contact with a road surface. A modulus (Mm) of a rubber composition in the middle regions (22) is lower than a modulus (Mc) in the center region (18) and is higher than a modulus (Ms) in the shoulder regions (20). A ratio ((Mc−Mm) / (Mm−Ms)) is equal to or higher than 1 / 3 and is equal to or lower than 3 / 1. A ratio (Wm / W) is equal to or higher than 0.3 and is equal to or lower than 0.8. A ratio (Wc / W) is equal to or higher than 0.1 and is equal to or lower than 0.4. A ratio (Ws / W) is equal to or higher than 0.1 and is equal to or lower than 0.4.

A radius of curvature (R1) of a corner portion (40) on one side (an inside in an axial direction) of a groove of a tyre (20) is smaller than a radius of curvature (R2) of the other corner portion (41). Both of the radii of curvature (R1) and (R2) are set to be 2 mm or more. A first phantom circle (42) for defining the corner portion (40) is inscribed on a second phantom circle (43) for defining the corner portion (41). A point of contact (44) of the first phantom circle (42) and the second phantom circle (43) is positioned on an outside from the center of a groove (28c). A distance between the center of the groove (28c) and the point of contact (44) is equal to or smaller than one fifth of a width (B) of the groove (28c).

A tire (18) includes a pair of beads (24), a carcass (26), a belt (28), and a band (30). The carcass (26) includes a carcass ply (44) having a carcass cord. The carcass cord is constituted by a rayon fiber or an aramid fiber. The belt 28 includes belt plies (46) and (48) having belt cords. The belt cord is constituted by an aramid fiber. The belt cord has a fineness which is equal to or greater than 1400 dtex and is equal to or smaller than 1600 dtex. The belt cord has a density which is equal to or higher than 20 ends / 5 cm and is equal to or lower than 30 ends / 5 cm. The band (30) includes a band ply (50) having a band cord. The band cord is wound spirally in a substantially circumferential direction.

The invention relates to astable support system for dismantling a motorcycle tire comprising a support plate, a height push rod, a placing platform and a locking device; a sliding groove is arranged on the top of the left end of the support plate, the top of the support plate is connected with the bottom of the height push rod, The placing platform is installed on the top of the height push rod, the left side surface of the placing platform is provided with a guide square groove, the left end front and rear sides of the placing platform are distributed with a lifting sliding groove, the rightend middle part of the placing platform is provided with a buffer sliding groove, the right end front and rear sides of the placing platform are provided with a square groove, and a locking device isinstalled on the placing platform. The present invention can solve the problems that the whole position of the motorcycle can not be raised when the existing motorcycle is dismantled, the front wheelof the motorcycle can not be locked, the position of the motorcycle can not be corrected when the motorcycle is parked, the motorcycle can not be steadily lifted, and the motorcycle will sway forwardand backward when the tire is dismantled, and the like.

A motorcycle tire includes at least one carcass-type reinforcement structure formed of reinforcement elements, anchored on either side of the tire to a bead whose base is intended to be mounted on a rim seat, each bead being extended radially towards the outside by a sidewall. The sidewalls meet up radially towards the outside with a tread. Under the tread there is a crown reinforcement structure including at least one layer of reinforcement elements known as a working layer which has at least one continuous reinforcement cord forming portions in the central zone thereof. Those central cord portions display identical angles of between 10-80 degrees formed with the longitudinal direction, the angles being measured at points of intersection of the cord with a circumferential plane. Two adjacent cord portions are linked by a U-shaped loop.

A motorcycle low-profile positioning creeper allows a medium to large motorcycle to be easily mounted on the positioning creeper and easily moved to any desired position on a horizontal surface such as a showroom floor or storage area. The positioning creeper comprises a low slung H-frame body and four rotatable wheels. The low slung H-frame body is a plate and comprises four corners and four protrusions. The four protrusions protrude upward and outward respectively from the corners and are separated from adjacent longitudinal protrusions a distance greater than a motorcycle tire width. The four rotatable wheels are mounted respectively under the four protrusions.

The present invention is directed to a hybrid cabled cord comprising: at least two yarns having different properties and an unbalanced configuration wherein the hybrid cabled cord has improved tensile strength retention. In a preferred embodiment one of the two yarns comprises polyethylene terephthalate and the second of at least two yarns comprises polyethylene naphthalate and the coring level is between about 3% to about 15%. The present invention is also directed to a process for making a hybrid cabled cord comprising the steps of supplying at least two yarns having different properties to a direct cabler, and cabling the at least two yarns using the direct cabler to achieve a hybrid cabled cord having a coring level which is not zero. The present hybrid cabled cord may be used in tire cord for rubber reinforcement in passenger car tires, van tires, light truck tires, or motorcycle tires.

A motorcycle tire is provided with crown main oblique grooves disposed on alternating sides of the tire equator and each extending from its axially inner end to its axially outer end, without cutting across the tire equator, while inclining to one circumferential direction, wherein the axially outer end is located outside an upstanding tire's ground contact annular zone. When measured in the annular zone, the circumferential distance between the circumferentially adjacent crown main oblique grooves existing on the same side of the tire equator is in a range of not more than 0.5 times an upstanding tire's ground contact length. In the annular zone, the crown main oblique grooves on one side of the tire equator is partially overlaps those on the other side. When measured in the annular zone, the circumferential length of the crown main oblique groove is less than the upstanding tire's ground contact length.

A tire (10) has a carcass ply (15) formed along a tread portion (11), a shoulder portion (12) and a sidewall portion (13). The carcass ply (15) is reinforced by a belt ply (16) and a band ply (17). The belt ply (16) includes a fold-back portion (19). A buffer layer (18) is formed between the belt ply (16) and the band ply (17). A dimension (SW) of the inner end of the fold-back portion (19) is set to be 20% to 40% of a tread width (TW). A width (JW) of the band ply (17) is set to be 20% to 65% of the tread width (TW). A dimension of the overlap of the fold-back portion (19) and the band ply (17) is set to be equal to or smaller than 15 mm.

A motorcycle wheel assembly comprising a brake hub rotatably mounted to a wheel axel. A brake disc is affixed to the brake hub rotating with the brake hub. A tire hub is rotatably carried by the brake hub carrying a tire for contacting a road surface to rotate the tire hub. A transfer gear is disposed between the tire hub and the brake hub for interconnecting the brake hub and tire hub. A center gear is carried by the brake hub for engaging the transfer gear, and a ring gear is carried by the tire hub for engaging the transfer gear so that rotation of the tire hub causes the transfer gear to counter-rotate the brake hub. Accordingly, counter-rotation of the brake disc carried by the brake hub creates a counter-rotational gyroscopic force that cancels out the gyroscopic force created by rotation of the motorcycle tire and tire hub.

The present invention is to provide a motorcycle tire capable of remarkably improving a traction characteristic and an anti-sideslip characteristic for cornering without deteriorating the mud expulsion characteristic especially on a dirt road. A motorcycle tire has a plurality of main blocks 2 scattered on a tread 1. Sub blocks 3 are provided between the main blocks 2. The sub block 3 is made of rubber and has block height H2 lower than that the height H1 of the main block 2. A part of the rubber constituting a top portion 9 of the sub block 3 has been removed to reduce the area of a upper face 5 of the sub block 3.

There is provided a tire for motorcycle having a carcass as a bone structure extending between and connecting a pair of bead cores, at least one circumferential belt layer fabricated by spirally winding a cord along the circumferential direction of the carcass, and at least one inclined belt layer fabricated by arranging multiple cords extending obliquely with respect to the equatorial plane of the tire in parallel with each other, the circumferential and inclined belt layers being disposed radially outward of a crown portion of the carcass, wherein the circumferential belt layer has a distribution of placement density of cords which decreases from the equatorial plane toward the shoulder portion of the tire to, thereby, satisfy both of the high-speed durability and driving performance by improving various characteristics especially during cornering.

A motorcycle wheel changing tool is presented that utilizes a rolling carriage that immobilizes the front or back wheel utilizing flat steel swing arms and a tension spring that holds the wheel in place with a knockout retaining rod through the wheel. The entire unit can be rolled and / or lifted in place to work in conjunction with a motorcycle stand. There is a folding handle that expands or contracts to accommodate different size tire / wheel widths and can pull the unit. The rolling wheels can be raised or lowered for different motorcycles depending on the height of the bike in relation to the wheel stand. Additionally, four large eye hooks can be raised or lowered to secure the wheel. Two threaded rods are utilized that secure both angle ends in place to secure the unit so that it is perpendicular to the wheel and keeps the unit from flexing.

The invention discloses a formula of motorcycle tire tube rubber. The tire tube rubber comprises, by weight, 34.2 parts of natural rubber, 11.4 parts of butadiene styrene rubber, 11.4 parts of butadiene rubber, 39.9 parts of carbon black, 2.28 parts of aromatic hydrocarbon oil, 0.513 part of accelerant CZ, 1.14 parts of sulphur, 1.14 parts of antiager RE, 0.855 part of paraffin, 2.85 parts of zinc oxide, 0.684 part of dispersing agent FS-79, 0.0855 part of scorch retarder CTP, 0.969 part of antiager 4020, 1.14 parts of internal releasing agent, 1.425 parts of stearic acid and 1.71 parts of C9 petroleum resin. The formula formed according to the weight parts is adopted for the motorcycle tire tube rubber, product quality can be effectively improved, raw material and production cost is reduced, and meanwhile the produced tire tube rubber has good air tightness, heat resistance, cold resistance, elasticity, aging resistance and small permanent deformation; tearing strength and elongation at break of the tire tube rubber are remarkably improved, the use requirements on a tire tube in a high-temperature and stretching state can be met, the use performance of the tire tube is greatly improved, and the service life of the tire tube is greatly prolonged.

A motorcycle tire for running on rough terrain, the tire includes a tread portion including a central region, a pair of shoulder regions and a middle region. The tread portion is provided with at least one central block with a ground contact face whose centroid is located within the central region, at least one shoulder block with a ground contact face whose centroid is located within the shoulder region on each side of a tire equator, and at least one middle block with a ground contact face whose centroid is located within the middle region on each side of the tire equator. When the respective blocks are projected onto a tire meridian cross section along a circumferential direction of the tire, every pair of axially adjacent two blocks are arranged so as to overlap one another at least partially on the tire meridian cross section.

Motorcycle tyre suitable for mounting on the rear wheel of a motorcycle, including a tread band having a tread pattern includes a module which is repeated in a direction of circumferential extension of the tyre, the module having: at least two substantially longitudinal first grooves which are inclined opposite to each other with respect to the equatorial plane of the tyre; and at least two substantially longitudinal second grooves which are inclined opposite to each other with respect to the equatorial plane. Each substantially longitudinal first groove alternates with a second longitudinal groove. The substantially longitudinal first grooves have, in a direction axially away from the equatorial plane of the tyre, two substantially consecutive curvilinear sections, the first section of which has a convexity and the second section of which has a concavity directed in the rolling direction of the tyre. The first curvilinear section defines along its extension with the equatorial plane angles smaller than or equal to 90°.