TIRE FOR A MOTORCYCLE

A tire 1 for a motorcycle comprises a tread portion 2 provided on an inner surface 2Si thereof with a sealant layer 11 for preventing puncture. In each half of a cross-sectional view of the tire 1, when the tread portion 2 is virtually divided into a center region 2C, a middle region 2M, and a shoulder region 2S, a thickness tm of the sealant layer 11 in the middle region 2M is larger than a thickness tc of the sealant layer 11 in the center region 2C.

MOTORCYCLE TIRE FOR TRAVELING ON ROUGH TERRAIN AND TIRE VULCANIZATION MOLD

To provide a motorized two-wheeled vehicle tire for traveling on uneven terrain, the block durability performance of which has been improved; and a tire vulcanization mold capable of molding said tire. A motorized two-wheeled vehicle tire for traveling on uneven terrain wherein multiple blocks are provided on the tread at intervals in the tire circumference direction. Recesses are provided on the bottom surfaces of the grooves. Multiple recesses are provided at intervals in the axial direction of the tire. Spew, which was drawn up into the vent holes of the mold during vulcanization molding, or removal marks thereof are provided between each recess and the block that is adjacent in the tire circumference direction.

PNEUMATIC RADIAL TYRE

A pneumatic radial tyre includes a plurality of shoulder lateral grooves crossing shoulder lard regions. In a cross-sectional view of at least one of the shoulder lateral grooves taken along a groove width center line thereof, a groove bottom of the shoulder lateral groove includes a first bottom surface portion arranged on an inner side in a tyre axial direction and a second bottom surface portion extending between the first bottom surface portion and the tread surface outer end in a concave arc shape having a radius of curvature. 1. A pneumatic radial tyre comprising a tread portion comprising a tread surface extending in a convex arc shape between a tyre equator and a tread surface outer end , a shoulder main groove extending in a tyre circumferential direction , a shoulder land region defined between the shoulder main groove and the outer end of the tread surface , and a plurality of shoulder lateral grooves each crossing the shoulder land region , whereinin a cross sectional view of at least one of the shoulder lateral grooves taken along a groove width center line thereof, a groove bottom of the shoulder lateral groove includes a first bottom surface portion arranged on an inner side in a tyre axial direction and a second bottom surface portion extending between the first bottom surface portion and the tread surface outer end in a concave arc shape having a radius of curvature (R).2. The pneumatic radial tyre according to claim 1 , whereinthe radius of curvature (R) is 50 mm or more and 200 mm or less.3. The pneumatic radial tyre according to claim 1 , wherein the second bottom surface portion is connected with the first bottom surface portion.4. The pneumatic radial tyre according to claim 1 , whereinthe at least one of the shoulder lateral grooves has a groove width increasing toward the tread surface outer end.5. The pneumatic radial tyre according to claim 1 , whereina maximum groove depth of the at least one of the shoulder lateral grooves is 4.0 mm or ...

MOTORCYCLE TIRE FOR UNEVEN GROUND TRAVEL

The purpose of the present invention is to provide a motorcycle tire for uneven ground travel for which the sticking of dirt to block grooves can be effectively prevented. Provided is a motorcycle tire for uneven ground travel in which a tread portion has a block pattern in which a plurality of blocks are provided. The blocks include, at the tread surface, at least one grooved block which has a block groove which is substantially C-shaped in plan view. The block groove has a pair of first groove portions that mutually extend in the same direction from the edge of the tread surface, and a second groove portion that links the first groove portions. The groove width W of the second groove portion is larger than the groove width W of the first groove portions, or the groove depth d of the second groove portion is larger than the groove depth d of the first groove portions. 1. A motorcycle tire for rough terrain comprising:a tread portion comprising a block pattern having a plurality of blocks;the blocks comprising at least one grooved block whose ground contact surface is provided with a block groove;the block groove comprising a pair of first groove portions mutually extending in a same direction from an edge of the ground contact surface, and a second groove portion connecting the first groove portions; andthe second groove portion having a groove width greater than groove widths of the first groove portions.2. A motorcycle tire for rough terrain comprising:a tread portion comprising a block pattern having a plurality of blocks;the blocks comprising at least one grooved block whose ground contact surface is provided with a block groove;the block groove comprising a pair of the first groove portions mutually extending in a same direction from an edge of the ground contact surface, and the second groove portion connecting the first groove portions; andthe second groove portion having a groove depth greater than groove depths of the first groove portions.3. The ...

MOTORCYCLE TIRE FOR UNEVEN TERRAIN

[Object] A motorcycle tire, for an uneven terrain, which exhibits both impact absorption and handling stability is provided. 1. A motorcycle tire for an uneven terrain , the motorcycle tire comprising:a tread having an outer surface that forms a tread surface;a pair of sidewalls that extend almost inward from ends, respectively, of the tread in a radial direction;a pair of beads disposed inward of the sidewalls, respectively, in the radial direction;a carcass that is extended on and between one of the beads and the other of the beads in a portion inward of the tread in the radial direction; anda pair of rubber reinforcing layers disposed inward of the carcass near ends, respectively, of the tread surface, wherein{'b': 1', '2', '1, 'a profile of the tread surface is formed by: an arc C that is disposed at a center in an axial direction, and that projects outward in the radial direction; and a pair of arcs C each of which is disposed outward of the arc C and each of which projects outward in the radial direction,'}{'b': 1', '2, 'the arc C contacts with the arcs C,'}{'b': 1', '1', '2', '2, 'a radius R of curvature of the arc C is less than a radius R of curvature of each arc C,'}outer ends of the rubber reinforcing layers are disposed outward of the ends of the tread surface in the radial direction,inner ends of the rubber reinforcing layers are disposed inward of the ends of the tread surface in the radial direction, andthe rubber reinforcing layers are not disposed on an equator plane.22121. The motorcycle tire for an uneven terrain according to claim 1 , wherein a ratio (R/R) of the radius R of curvature to the radius R of curvature is greater than or equal to 1.1 claim 1 , and not greater than 1.3.3. The motorcycle tire for an uneven terrain according to claim 1 , whereinwhen h represents a height, in the radial direction, from the inner end of each rubber reinforcing layer to the outer end thereof, and H represents a height, in the radial direction, from a base ...

MOTORCYCLE TIRE AND FRONT AND REAR MOTORCYCLE TIRES

A bias-ply motorcycle tire comprises a tread portion provided with main grooves and sipes. The main grooves extend from a tread crown region into tread shoulder regions. The sipes are provided only within the tread shoulder regions.

MOTORCYCLE TIRE

A motorcycle tire includes a tread portion including a crown portion that is a region of 50% of a tread development width centered on a tire equator, a first shoulder portion that is an outer region of the crown portion, and first lateral grooves. Each lateral groove includes a first groove portion in the crown portion, a second groove portion in the first shoulder portion, and a third groove portion connecting the first and second groove portions. A groove depth and a groove width of the third groove portion are respectively smaller than groove depths and groove widths of the first groove portion and the second groove portion, respectively. More than 80% of a tire axial length of the third groove portion is in the first shoulder portion.

PNEUMATIC TIRE FOR RUNNING ON ROUGH TERRAIN

A pneumatic tire for running on rough terrain comprises a tread portion provided with center blocks, middle blocks and shoulder blocks to form a block tread pattern, wherein some or all of the center blocks are each provided with a slot positioned at the midpoint of the block in the tire circumferential direction, and extending axially inwardly from a sidewall surface of the block oriented toward a tread edge, and terminating within the block. 1. A pneumatic tire for running on rough terrain comprising a tread portion provided with center blocks , middle blocks and shoulder blocks to form a block tread pattern , wherein some or all of the center blocks are each provided with a slot positioned at the midpoint of the block in the tire circumferential direction , and extending axially inwardly from a sidewall surface of the block oriented toward a tread edge , and terminating within the block.2. The pneumatic tire according to claim 1 , wherein{'b': 2', '1, 'when measured at the radially outer surface of the slotted block, the maximum circumferential width W of the slot is 0.10 to 0.30 times the maximum circumferential dimension L of the radially outer surface of the slotted block,'}3. The pneumatic tire according to claim 1 , wherein{'b': 2', '1, 'when measured at the radially outer surface of the slotted block, the axial length L of the slot is 0.15 to 0.50 times the maximum axial dimension W of the radially outer surface of the slotted block.'}4. The pneumatic tire according to claim 1 , whereinthe depth of the slot is 0.25 to 0.50 times the height of the slotted block.5. The pneumatic tire according claim 1 , whereinthe center blocks include a first center block disposed on the tire equator and provided with the two slots one on each side of the tire equator.6. The pneumatic tire according to claim 1 , whereinthe center blocks include a second center block disposed off the tire equator and provided with the single slot.7. The pneumatic tire according to claim 1 , ...

PNEUMATIC TIRE

[Object] To provide a pneumatic tire in which weight reduction is achieved without deteriorating internal pressure maintaining performance. 1. A pneumatic radial tire comprising:a tread having an outer surface which forms a tread surface;a pair of sidewalls extending from ends of the tread, respectively, substantially inward in a radial direction;a pair of beads located substantially inward of the sidewalls, respectively, in the radial direction;a carcass extending on and between one of the beads and the other of the beads and along and inward of the tread and the sidewalls;a belt laminated on the carcass at an inner side, in the radial direction, of the tread; anda liner located inward of the carcass, whereinouter ends of the sidewalls are located inward of ends of the belt in an axial direction,the liner includes a first inner liner extending on and between one of the beads and the other of the beads and along and inward of the carcass; and a pair of second inner liners extending from the ends of the belt, respectively, along the first inner liner substantially inward in the radial direction,the second inner liners are located between the first inner liner and the carcass,outer ends of the second inner liners are located inward of the ends of the belt in the axial direction,the first inner liner is formed by a first sheet, formed from a first rubber composition, being crosslinked,each second inner liner is formed by a second sheet, formed from a second rubber composition, being crosslinked,each second sheet has a reference end corresponding to the outer end of the second inner liner,in forming the liner, each second sheet is attached to the first sheet such that the reference end of the second sheet abuts against an outer surface of the first sheet,each second sheet has an inclined surface extending from the reference end so as to be inclined relative to the outer surface of the first sheet,an inclination angle of the inclined surface of each second sheet is equal ...

PNEUMATIC TIRE FOR A MOTORCYCLE

The pneumatic tire for a motorcycle comprises a tread portion comprising a belt layer , an inner liner layer made of air impermeable rubber and arranged radially inside the belt layer , and a sealant layer attached to a radially inner surface () of the inner liner layer . The sealant layer comprises a crown portion A arranged at a center thereof in a tire axial direction and a pair of shoulder portions B arranged on both sides of the crown portion A in the tire axial direction. Viscosity μ of the shoulder portions B is larger than viscosity μ of the crown portion A. 2. The pneumatic tire for a motorcycle according to . whereinthe viscosity of the crown portion at 90 degrees Celsius is not smaller than 1 kPa·s and smaller than 10 kPa·s, andthe viscosity of the shoulder portions at 90 degrees Celsius is in a range of from 4 to 10 kPa·s.3. The pneumatic tire for a motorcycle according to claim 1 , whereinthe belt layer comprises a crown region arranged radially outside the crown portion, anda distance in the tire radial direction between an axially outer end of the crown region and an radially outer end of the crown region is not greater than 12 mm.4. The pneumatic tire for a motorcycle according to claim 1 , whereinthe sealant layer is made of a composition including butyl rubber and polybutene, andthe composition contains the polybutene in a range of from 100 to 400 parts by mass with respect to 100 parts by mass of the butyl rubber.5. The pneumatic tire for a motorcycle according to claim 4 , whereinan average molecular weight of the polybutene is in a range of from 1000 to 4000.6. The pneumatic tire for a motorcycle according to claim 1 , whereinan axial width of the sealant layer is in a range of from 23% to 86% of an axial width of the belt layer. The present invention relates to a pneumatic tire for a motorcycle having excellent puncture sealing performance and steering stability.conventionally, a pneumatic tire for a motorcycle has been known in which a viscous ...

Pneumatic tire and method for manufacturing pneumatic tire

A pneumatic tire excellent in high speed stability and turning ability is provided. In a band of a tire, a center portion located in an axial center has a helically wound structure in which a first band body including a first cord is wound. A shoulder portion located on an axial outside of the center portion has a meshed structure formed by a second band body including a second cord. The shoulder portion includes a plurality of first portions, a plurality of second portions and a plurality of third portions. Each first portion is inclined and extends from an axially inner end of the shoulder portion to an axially outer end of the shoulder portion. Each second portion is inclined in an opposite direction from the first portion and extends from the axially inner end of the shoulder portion to the axially outer end of the shoulder portion.

Motorcycle tire for uneven terrain

[Solution] A tire 2 includes a pair of rubber reinforcing layers 14 disposed inward of a carcass 10 near ends, respectively, of a tread surface 16. A profile of the tread surface 16 is formed by: an arc C1 that is disposed at a center, and that projects outward in a radial direction; and a pair of arcs C2 each of which is disposed outward of the arc C1 in an axial direction and each of which projects outward in the radial direction. The arc C1 contacts with the arcs C2. A radius R1 of curvature of the arc C1 is less than a radius R2 of curvature of each arc C2. Outer ends 40 of the rubber reinforcing layers 14 are disposed outward of ends TE of the tread surface 16 in the radial direction. Inner ends 42 of the rubber reinforcing layers 14 are disposed inward of the ends TE of the tread surface 16 in the radial direction. The rubber reinforcing layers 14 are not disposed on an equator plane.

Motorized two-wheeled vehicle tire for traveling on uneven terrain and tire vulcanization mold

Pneumatic tire for a motorcycle

The pneumatic tire 1 for a motorcycle comprises a tread portion 2 comprising a belt layer 7 , an inner liner layer 9 made of air impermeable rubber and arranged radially inside the belt layer 7 , and a sealant layer 10 attached to a radially inner surface ( 9 a ) of the inner liner layer 9 . The sealant layer 10 comprises a crown portion 10 A arranged at a center thereof in a tire axial direction and a pair of shoulder portions 10 B arranged on both sides of the crown portion 10 A in the tire axial direction. Viscosity μ 2 of the shoulder portions 10 B is larger than viscosity μ 1 of the crown portion 10 A.

Tire for rough-terrain motorcycle

[Object] A motorcycle tire, for an uneven terrain, which exhibits both impact absorption and handling stability is provided. [Solution] A tire 2 includes a pair of rubber reinforcing layers 14 disposed inward of a carcass 10 near ends, respectively, of a tread surface 16. A profile of the tread surface 16 is formed by: an arc C1 that is disposed at a center, and that projects outward in a radial direction; and a pair of arcs C2 each of which is disposed outward of the arc C1 in an axial direction and each of which projects outward in the radial direction. The arc C1 contacts with the arcs C2. A radius R1 of curvature of the arc C1 is less than a radius R2 of curvature of each arc C2. Outer ends 40 of the rubber reinforcing layers 14 are disposed outward of ends TE of the tread surface 16 in the radial direction. Inner ends 42 of the rubber reinforcing layers 14 are disposed inward of the ends TE of the tread surface 16 in the radial direction. The rubber reinforcing layers 14 are not disposed on an equator plane.

Motorcycle tire for traveling on rough terrain and tire vulcanization mold

To provide a motorized two-wheeled vehicle tire for traveling on uneven terrain, the block durability performance of which has been improved; and a tire vulcanization mold capable of molding said tire. A motorized two-wheeled vehicle tire for traveling on uneven terrain wherein multiple blocks are provided on the tread at intervals in the tire circumference direction. Recesses are provided on the bottom surfaces of the grooves. Multiple recesses are provided at intervals in the axial direction of the tire. Spew, which was drawn up into the vent holes of the mold during vulcanization molding, or removal marks thereof are provided between each recess and the block that is adjacent in the tire circumference direction.

Motorcycle tire and front and rear motorcycle tires

Tire for motorcycle

Bias tyre for two-wheel vehicle

Motorcycle tyre

pneumático para rodar em terrenos acidentados

PNEUMÁTICO PARA RODAR EM TERRENOS ACIDENTADOS. Pneumático para rodar em terrenos acidentados compreende uma porção de banda de rodagem dotada de blocos centrais, blocos medianos e blocos de ressalto para formar um padrão de banda de rodagem de bloco, em que alguns ou todos os blocos centrais são dotados, cada um deles, de uma fenda posicionada no ponto mediano do bloco na direção circunferencial do pneu e se estendendo axialmente para dentro de uma superfície de parede lateral do bloco orientado em direção a uma borda de banda de rodagem e terminando dentro do bloco.

Motorcycle tire

A motorcycle tire 1 includes a tread reinforcing layer 7 including a belt layer 8 and a band layer 9. The band layer 9 includes a band ply 9A in which band cords 9a are arranged at an angle θ1 relative to a tire circumferential direction. The belt layer 8 includes inner belt plies 8A disposed on both sides of the band ply 9A in the tire axial direction so as not to overlap the band ply 9A and an outer belt ply 8B disposed outward of the band ply 9A in the tire radial direction so as to overlap the band ply 9A. The inner belt plies 8A each have inner belt cords 8a arranged at an angle θ2 relative to the tire circumferential direction, and the outer belt ply 8B has outer belt cords 8b arranged at an angle θ3 relative to the tire circumferential direction.

Bias tyre for two-wheel vehicle

A bias tyre for two-wheel vehicle includes a tread portion defining a pair of tread edges, a pair of sidewall portions, a carcass having a bias structure, a pair of sidewall rubber portions forming an outer surface of the pair of sidewall portion, and a tread rubber forming an outer surface of the tread portion and connected to the pair of sidewall rubber portions to form a pair of boundary surfaces therebetween, wherein outermost ends in a tyre axial direction of the pair of boundary surfaces are located on an outer surface of the tyre and inwardly in a tyre radial direction of the respective tread edges.

Tire for a motorcycle

A tire 1 for a motorcycle comprises a tread portion 2 provided on an inner surface 2 Si thereof with a sealant layer 11 for preventing puncture. In each half of a cross-sectional view of the tire 1 , when the tread portion 2 is virtually divided into a center region 2 C, a middle region 2 M, and a shoulder region 2 S, a thickness tm of the sealant layer 11 in the middle region 2 M is larger than a thickness tc of the sealant layer 11 in the center region 2 C.

Tire for a motorcycle

Pneumatic tire

To provide a pneumatic tire 34 in which weight reduction is achieved without deteriorating internal pressure maintaining performance. The tire 34 includes a liner 46 located inward of a carcass 42 . The liner 46 includes a first inner liner 66 extending on and between one of beads and the other of the beads and along and inward of the carcass 42 ; and a pair of second inner liners 68 extending from ends 62 a of a belt 44 , respectively, along the first inner liner 66 substantially inward in a radial direction. The second inner liners 68 are located between the first inner liner 66 and the carcass 42 . The first inner liner 66 is formed by a first rubber composition being crosslinked. A base rubber of the first rubber composition includes a butyl rubber. Each second inner liner 68 is formed by a second rubber composition being crosslinked. A base rubber of the second rubber composition includes a diene rubber.

Pneumatic tire for running on rough terrain

A pneumatic tire for running on rough terrain comprises a tread portion provided with center blocks, middle blocks and shoulder blocks to form a block tread pattern, wherein some or all of the center blocks are each provided with a slot positioned at the midpoint of the block in the tire circumferential direction, and extending axially inwardly from a sidewall surface of the block oriented toward a tread edge, and terminating within the block.