Abstract: A tire includes a pair of beads and a plurality of body plies extending between the pair of beads, including at least a first body ply and a second body ply. The first body ply wraps around each of the pair of beads, and has a first pair of turn up portions having a first height. The second body ply wraps around each of the pair of beads, and has a second pair of turn up portions having a second height greater than the first height. Each of the second pair of turn up portions is axially inside each of the first turn up portions. The tire also includes a circumferential belt disposed radially above the plurality of body plies, a circumferential tread disposed radially above the circumferential belt, and a pair of sidewalls extending between the pair of beads and the circumferential tread. The tire also has a pair of stabilizer ply inserts, including a first stabilizer ply insert and a second stabilizer ply insert.

Abstract: The invention relates to vehicle tires for utility vehicles, comprising a belt (9) and a tread profile that extends in the axial direction A of the vehicle tire between two tire shoulders, in each of which a profiled shoulder strip (19) is formed that extends over the circumference of the vehicle tire. The profiled shoulder strip is delimited in the axial direction A towards the equatorial plane Ä of the tire by a groove (20), which extends over the circumference of the vehicle tire, and on the profiled strip face facing away from the equatorial plane Ä by a respective surface of the tire lateral wall (2), which forms the profiled shoulder strip (19) flank facing away from the equatorial plane Ä. The tread profile is delimited by a surface which forms the road contact surface on the sectional planes containing the tire axis, said surface forming a surface contour line K which is curved towards the tire between the profiled shoulder strips (19).

Abstract: A precured tread assembly for mounting on a tire casing is provided. The precured tread assembly includes a tread portion having a mounting surface and an opposing ground-engaging surface with a plurality of grooves therein. A reinforcing fabric layer is attached to the mounting surface of the tread portion.

Abstract: Provided herein are cured rubber compositions containing guayule natural rubber with 2.5-4 weight % resin and fillers. By the use of a specified cure package that contains increased amounts of sulfur and accelerator, the cured rubber compositions are found to exhibit strain induced crystallization (as can be observed by X-ray diffraction). Also provided are related methods for preparing the rubber compositions.

Abstract: Provided herein are cured rubber compositions containing guayule natural rubber with 2.5-4 weight % resin and fillers. By the use of a specified cure package that contains increased amounts of sulfur and accelerator, the cured rubber compositions are found to exhibit strain induced crystallization (as can be observed by X-ray diffraction). Also provided are related methods for preparing the rubber compositions.

Abstract: The invention relates to a tire having a rubber tread comprised of cap/base construction where the tread outer cap rubber layer contains the running surface of the tread and the tread base rubber layer underlies the tread cap layer wherein the base layer provides a transition zone between the tread cap layer and the remainder of the tire carcass and is not intended to be ground-contacting. For this invention, the tread base rubber layer is comprised of three distinct zones, namely a circumferential annular central rubber zone positioned between two lateral annular rubber zones. In one aspect, the rubber tread cap layer and zoned rubber tread base layer are co-extruded together to form an integral tread rubber composite.

Abstract: In a tire according to the present invention, the shape of the outermost reinforcing layer in the tire radial direction is optimized.

Abstract: The present invention aims at providing a pneumatic tire for a motorcycle, capable of improving steering stability and wear resistance in a turning situation with maintaining good turning performance achieved by a relatively wide auxiliary belt layer. Specifically, the present invention provides a pneumatic tire for a motorcycle, characterized in that: the auxiliary belt layer is sectioned into a middle area Am overlapping a region where the belt layer is provided and respective side areas As each extending beyond the region where the belt layer is provided; the cords in the middle area Am extend at an inclination angle ?m in the range of 70° to 90° with respect to the tire circumferential direction; and the cords in each side area As extend, in at least a portion of the side area, at an inclination angle ?s different from the inclination angle ?m with respect to the tire circumferential direction.

Abstract: The present invention provides a heavy duty tire, comprising: a carcass; a belt constituted of a circumferential belt including at least one circumferential belt layer and a slant belt including at least one slanted belt layer, each belt layer being made of cords coated with belt coating rubber; and a cushion rubber provided on the outer side in the tire width direction of the belt layers, characterized in that: the cushion rubber has a belt adjacent portion adjacent to the belt and a main body portion adjacent to the belt adjacent portion; and provided that E1?, E2? and E3? represent storage modulus values of the belt adjacent portion of the cushion rubber, the main body portion of the cushion rubber, and the belt coating rubber, respectively, E1?, E2? and E3? satisfy relationship E2?<E1??E3?.

Abstract: Heavy vehicle tire treads and/or undertread constituted at least in part from a rubber composition comprising between 80 and 100 phr of a natural rubber and between 0 and 20 phr of a synthetic polyisoprene rubber, a reinforcement filler comprising a) between 30 and 50 phr of a highly dispersible silica and b) a carbon black in an amount of between (0.75)C phr and (1.25)C phr as determined by the equation C=?0.8Si+44.3, wherein Si is the amount of the highly dispersible silica, a silane coupling agent and a sulfur curing system comprising between 1.5 and 3 phr of free sulfur and between (0.9)A phr and (L 1)A phr of a sulfenamide accelerator, wherein A is determined by a formula that is a function of the sulfur quantity and the silica weight fraction of the total reinforcement filler.

Abstract: A tire comprising a crown reinforcement formed from at least two working crown layers of reinforcing elements and at least one layer of circumferential reinforcing elements, wherein, the tensile modulus of elasticity at 10% elongation of at least one skim coat of at least one working crown layer is greater than 9 MPa and the maximum value of tan(?), denoted tan(?)max, of said skim coat is less than 0.100.

Abstract: A tire comprising a crown reinforcement formed from at least two working crown layers of reinforcing elements, a layer C of rubber mixture being placed between at least the ends of said at least two working crown layers, the crown reinforcement including at least one layer of circumferential reinforcing elements wherein the tensile modulus of elasticity at 10% elongation of the layer C is greater than 9 MPa and the maximum value of tan(?), denoted tan(?)max, of the layer C is less than 0.100.

Abstract: A belt width of an intersecting belt 15a having the maximum belt width is set to 80% or more of the maximum width of a carcass line; a difference in belt widths between the intersecting belt 15a and an intersecting belt 15b is set in the range of 10 mm to 50 mm on one side of the belt in the width direction; the intersecting belt 15a is not narrower than the circumferential belt 14, and the circumferential belt 14 is not narrower than the intersecting belt 15b; and a pneumatic tire according to the present invention has an interposed rubber 16 having a thickness increasing toward the widthwise outer side of the tire to be 3 mm or more, and a side-lower rubber 17 having an elastic modulus less than the elastic modulus of a coating rubber coating the circumferential belt 14.

Abstract: A tire includes two beads configured to come into contact with a mounting rim and two sidewalls extending the beads radially to the outside, the two sidewalls being joined together in a crown. A crown reinforcement extends axially between two axial ends and is surmounted by a tread. The crown includes, radially on the inside of the tread and radially on the outside of a carcass reinforcement, at least one first layer of rubber mix having a modulus of elasticity which is greater than or equal to 50 MPa, this first layer extending from the median plane of the tire axially to the outside, on both sides of the median plane, only as far as an axial distance from the median plane which is less than the axial distance of the axial end of the crown reinforcement from the median plane.

Abstract: A tire with a radial carcass reinforcement comprising a crown reinforcement formed from at least two working crown layers of inextensible reinforcing elements and from at least one layer of circumferential reinforcing elements positioned radially between two working crown layers, the working crown layers adjacent to the layer of circumferential reinforcing elements being on each side of the equatorial plane and in the axial continuation of the layer of circumferential reinforcing elements coupled over an axial width, in order thereafter to be decoupled. A layer of polymer blend having a thickness greater than 1.5 mm over an axial width greater than 0.1×d is positioned axially between the axially exterior end of the layer of circumferential reinforcing elements and the axially interior end of the coupling zone of the working crown layers.

Abstract: A pneumatic tire having pairs of shoulder section and bead section shear layers positioned on at least one axial side of the carcass layer. Examples include one or more of the shear layers constituted of an elastomeric fabric having elastomeric fibers woven in the fabric. Such fibers may be spandex fibers and the fabric may further be characterized as being woven additionally with nylon fibers in a tricot construction. Other embodiments include at least one of the shear layers constituted of a polyurethane type elastomer material having an MA1O of between 1 MPa and 350 MPa. Exemplary shoulder section and bead section shear layers in a pinch shocked region are opposite across an interior of the tire.

Abstract: A radial tire for a motorcycle capable of having high road grip performance both when running at a high speed on a dry road surface and when cornering at a high speed, together with the high speed durability, especially a radial tire for a motorcycle with a large displacement to be used for road races, capable of maintaining these performances until the end of the races, is provided. The tilting angles of the cords 13a of said cross-belt 13 are set to 60 degrees or more to the circumferential direction, and a belt protecting layer 15 is disposed outside the spiral-belt 14, the belt protecting layer 15 having cords arranged in the direction tilted at 70 degrees or more to the circumferential direction.

Abstract: A pneumatic low aspect ratio truck has a crown reinforcing structure 7. The crown reinforcing structure 7 has a first steel belt ply 9 between the at least one carcass ply 3 and the tread 5, a second steel belt ply 11 between the first belt ply 9 and the tread 5, a third steel belt ply 13 between the second steel belt ply 11 and the tread 5 and a fourth steel belt ply 15 between the third steel belt ply 13 and the tread 5. The crown reinforcing structure 7 additionally has at least one circumferential steel strip 17 between the second and the third belt plies 11, 13.

Abstract: A method for simulating the behavior of a tire mounted on a vehicle in running conditions on the ground, wherein a mechanical model is provided for essentially computing the longitudinal (Fx) and transverse (Fy) stresses transmitted by the tire between the ground and the vehicle in accordance with dynamic parameters related to the physical conditions of the tire running and use and in accordance with physical tire-specific parameters. The mechanical model is set and solved in an iterative manner, under the assumption that the tire in contact with the surface of the ground has an adherence contact area and a sliding contact area and under the assumption that there is a unique x-coordinate point b that is indicative of the transition between the two contact areas.

Abstract: A pneumatic tire includes at least three belts arranged on a tire-radial-direction outer side of a carcass and a belt edge cushion arranged between a tire-width-direction outer end portion of a second belt that is secondly arranged from the tire-radial-direction outer side and a tire-width-direction outer end portion of a third belt that is thirdly arranged. The second belt is curved to a tire-radial-direction inner side in an area of the belt edge cushion in a tire width direction. A tire-width direction outer end of a first belt that is firstly arranged from the tire-radial-direction outer side is provided in a position close to a tire-width-direction inner end of the belt edge cushion in the tire width direction.

Abstract: Driving stability and durability is efficiently improved. Since a protecting layer 43 embedded with reinforcing cords 41 is disposed between a tread 35 and a belt reinforcing layer 31, both of the protecting layer 43 and the belt reinforcing layer 31 decentrally bear a large bending force generated when a pneumatic tire 11 runs on a sharp projection or a difference in level. As a result, even if reinforcing elements 33 in the belt reinforcing layer 31 are extended by large tension due to fill internal pressure, increase of strain generated in the reinforcing elements 33 can be effectively suppressed.

Abstract: A tire comprising at least two working layers and at least one layer of circumferential reinforcing elements positioned radially between two working crown layers. At least one layer of circumferential reinforcing elements has an axial width greater than 0.5×S, and is made up of two parts separated axially from one another, and, axially between the two parts of the layer of circumferential reinforcing elements, two working crown layers are coupled over an axial width greater than 0.035×S.

Abstract: The invention relates to a tire having a rubber tread comprised of a circumferential outer cap rubber layer which contains a tread running surface and an underlying undertread layer of softer rubber than said outer tread cap rubber layer wherein said undertread layer rubber composition contains short fiber reinforcement.

Abstract: A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls and the axially widest working crown layer being radially internal to the other working crown layers.

Abstract: Adhering a belt edge tape to both respective side edge portions of the belt on the outer peripheral surface of the building drum by supplying a belt edge tape toward the outer peripheral surface of the building drum by pressing using an extruder which constitutes a supply device facing the building drum in an opposed manner and by pressing the tape to the building drum using a press roller on a leading side as viewed from a position where the tape is supplied in the rotational direction of the building drum, the building drum is rotated in the direction that end portions of the reinforcing cords on the side edge portion of the belt which constitutes a tape adhering side are positioned on a trailing side in the rotational direction of the building drum thus adhering the tape to the side edge portion.

Abstract: According to the present invention, in adhering a belt edge tape (1) which is interposed between belt layers of a tire, press rollers surely adhere by pressing the belt edge tape (1) to a building drum (D) while preventing the press rollers from being caught by end portions of inclined cords which constitute a belt.

Abstract: A tire with a crown reinforcement that comprises at least three plies of reinforcing elements. At least a first profiled element P1 has an axially outer end that is situated at a distance from the equatorial plane of the tire which is less than the distance separating the plane from the end of a second ply. The profiled element P1 is radially separated from the radially outer liner C1 of a first ply by a second profiled rubber compound element G1. At least a third profiled element P2 has an axially outer end that is situated at a distance from the equatorial plane of the tire which is less than the distance separating the plane from the end of a third ply. The profiled element P2 is radially separated from the radially inner liner C2 of the first ply by a fourth profiled rubber compound element G2.

Abstract: A tire for a heavy vehicle, with radial carcass reinforcement, having an outside radius R greater than 1000 mm, comprising a crown reinforcement radially interposed between the carcass reinforcement and the tread, said crown reinforcement having at least one protective crown reinforcement radially adjacent to the tread. The tire comprises a complex having at least one layer of polymer mix with an axial width that is less than the width of the working crown reinforcement and with a thickness that is greater than 16 mm, the elastic modulus of said complex having a radial gradient, the lowest elastic modulus being greater than 15 MPa.

Abstract: Accumulation of static electricity is prevented while enhancing rolling resistance performance of tire. Tread rubber 2G has tread rubber body 15 forming tread ground contact surface 2S, under tread 16 disposed radially inward of the tread rubber body, and terminal portion 17 penetrating the tread rubber body in the radial direction, the under tread 16 being in contact with cushion rubbers 13 each having cushion main portion 13A interposed between edge portion 7E of tread-reinforcing layer 7 and carcass 6 over an overlap width W1 of 1 mm or more. Tread rubber body 15, topping rubber 7G of tread-reinforcing layer 7 and sidewall rubbers 3G are made of an insulating rubber material 20 having a volume resistivity of at least 1×108 ?·cm, and under tread 16, terminal portion 17, cushion rubber 13, topping rubber 6G of carcass 6 and chafer rubber 11 are made of a conductive rubber material having a volume resistivity of less than 1×108 ?·cm.

Abstract: A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, at least one protective layer being radially to the outside of the working crown layers, said crown reinforcement being topped radially by a tread, said tread being joined to two beads by means of two sidewalls. The tire additionally comprises in each shoulder at least one layer of reinforcement elements which are parallel to each other in the additional layer and are oriented circumferentially, the axially inner end of said additional layer being radially adjacent and external to the radially outermost working layer and said axially inner end of the additional layer being radially adjacent and internal to at least part of the protective layer.

Abstract: A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls and the axially widest working crown layer being radially internal to the other working crown layers.

Abstract: Provided is a pneumatic radial tire: that includes a circumferential-direction reinforcement layer having a width increased with fatigue break of the circumferential-direction reinforcement layer being suppressed at edge portions thereof; and that suppresses separation in each of cross belt layers at edge portions thereof. A pneumatic radial tire according to the present invention is a pneumatic tire including: at least two cross belt layers disposed on an outer circumferential side of a carcass layer in a tread portion; and at least one circumferential-direction reinforcement layer disposed between these cross belt layers, a width of the circumferential-direction reinforcement layer being smaller than that of each cross belt layer.

Abstract: The present invention provides a pneumatic tire that inhibits any fatigue rupture at an edge portion of a circumferential-direction reinforcing belt layer and also inhibits any separation at an edge portion of crossed belt layers. In the pneumatic tire, at least two crossed belt layers are disposed on the outer circumferential side of a carcass layer in a tread portion. At least one circumferential-direction reinforcing belt layer with a width smaller than those of the crossed belt layers is disposed between the crossed belt layers. Moreover, a stress relaxation layer of a rubber composition having a fixed thickness is disposed between the crossed belt layers while lying adjacent to an edge portion of and outside, in the width directions of, the circumferential-direction reinforcing belt layer.

Abstract: The present invention is based upon the unexpected finding that lignin can be incorporated into wire coat stock composition to improve metal to rubber adhesion. It has been further found that lignin can be used as a replacement in whole or in part for conventional rubber-to-metal adhesion promoters, such as cobalt materials which are conventionally used in wire coat stocks to attain and maintain needed rubber-to-wire adhesion properties. In fact, wire coat stocks that contain lignin provide more that adequate rubber-to-metal adhesion characteristics for typical applications, such as in tires, and maintain needed levels of adhesion over long periods of product service. For instance, high levels of rubber-to-metal adhesion are maintained under harsh conditions, such as exposure to elevated temperatures and high levels of humidity.

Abstract: A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls. The tire comprises additionally at least in each shoulder a layer of reinforcement elements which are oriented circumferentially and have an undulation, the axially inner end of said additional layer being radially adjacent to the edge of a working crown layer, the axially outer end of said additional layer being located at a distance from the equatorial plane of the tire which is at least equal to the distance between said plane and the end of the working layer to which it is adjacent and the distance between said layer and the end of the axially widest working crown layer being greater than 1.5 mm.

Abstract: A heavy duty pneumatic tire, which allows the inside narrow-width belt layers to have a wide width as desired, and which suppresses the amount of strain generated at side edge portions of the belt layer to be sufficiently small thereby effectively preventing the separation of the belt layer, therefore the belt, in which two inside narrow-width belt layers 1B, 2B and two outside wide-width belt layers 3B, 4B, which have a larger width than the narrow-width belt layers, are sequentially disposed in the outer periphery side of the crown area of the radial carcass 5, wherein a portion of the wide-width belt layer 3B adjacent to the outer periphery side of the two narrow-width belt layers 1B, 2B, corresponding to side-edge vicinity of the narrow-width belt layer 2B of the outer periphery side is formed to be convex in radially outward direction.

Abstract: A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls and at least two working layers having different axial widths.

Abstract: First, a first belt ply is wound around an outer peripheral surface of a belt drum having a curvature so as to be formed as a tubular shape, and a rubber layer protruding to an outer side than an end portion in a width direction of a belt reinforcing layer is arranged in an outer periphery of an end portion in a width direction of the first belt ply. Further, a second belt ply which is narrower than the first belt ply is wound around an outer periphery of the second belt ply so as to be formed as a tubular shape, and a belt layer is formed in such a manner that the first belt ply and the second belt ply are laminated. The belt reinforcing layer is formed by spirally winding a rubber-coated reinforcing cord around an outer peripheral side of the formed belt layer, and an end portion in a width direction of the belt reinforcing layer is arranged in an outer side than the first belt ply.

Abstract: A pneumatic tire for a motorcycle in which partial abrasion is suppressed by making the slip component of a tread lubber in the circumferential direction of tire as uniform as possible in the ground contacting plane. A cushion rubber layer 38 having elastic modulus lower than that of the tread rubber 30 is arranged on a spiral belt layer 22, and an inclination belt layer 24 including a cord inclining at an angle of 45 to 90 degrees to the circumferential direction of the tire is arranged on the cushion rubber layer 38. Consequently, shear deformation of the cushion rubber layer 38 during traveling can be transmitted to the tread rubber 30 after being smoothed by the inclination belt layer 24.

Abstract: A tire, which has a maximum section width, an upper section above the maximum section width, and a lower section below the maximum section width, includes a circumferential tread, a pair of sidewalls, and a pair of bead portions. The tire further includes at least one carcass ply extending circumferentially about the tire from one bead portion to the other and first and second reinforcement plies extending circumferentially about the tire. The first and second reinforcement plies are provided between the at least one carcass ply and at least one of the sidewalls of the tire. The first and second reinforcement plies include lower ends that terminate in the lower section of the tire and upper ends that terminate in the upper section of the tire.

Abstract: A pneumatic tire having at least two belt plies provided radially outwardly of a carcass ply in the tread. A belt cover ply is disposed radially outwardly of the at least two belt plies. The belt cover ply has reinforcing cords that extend in the circumferential direction of the tire and is covered with coating rubber. The belt cover ply extends beyond the edges of one of the at least two belt plies having a maximum belt width to have extension portions that extend at least 10 mm axially of the tire therefrom. The coating rubber of at least the extension portions of the belt cover ply is formed of rubber having a tan delta at a temperature of 60.degree. C. that is equal to or less than 0.1, and the ratio h/SH of a tire radial-direction length h between the edges of the extension portions and the edges of the belt ply having the maximum belt width to the tire section height SH is equal to or less than 1.5/100.

Abstract: A heavy duty tire having both an excellent wear resistance and a low rolling resistance and comprising a tread rubber having a two layer structure composed of a cap rubber layer 2Gb and a base rubber layer 2Ga underlying the cap layer, wherein the tread rubber extends axially outward from the tire equator and is bent at its edges to extend radially downward so that the cap layer is located axially outward of the base layer, and a pair of sidewall rubbers are disposed so that the radially outer end portion of each sidewall rubber covers the surface of the axially outer end of the tread rubber.

Abstract: A pneumatic tire includes: a carcass; an inner liner disposed at an inner side of the carcass in a tire radial direction; and a tie rubber layer disposed between the carcass and the inner liner, wherein the inner liner and the tie rubber layer are layered with the ends thereof being shifted from each other in a tire circumferential direction, and wherein the inner liner and the tie rubber layer are spliced with the ends of the inner liner in the tire circumferential direction overlapping each other and with the ends of the tie rubber in the tire circumferential direction overlapping each other.

Abstract: A rubber composition for a tire includes a rubber component containing at least one of a natural rubber and an epoxidized natural rubber, silica and a natural based wax, wherein the silica is contained in an amount of 10 parts by mass or more based on 100 parts by mass of the rubber component and the natural based wax is contained in an amount of 1.2% by mass or more and 2% by mass or less based on the total mass of the rubber composition for a tire, and to a tread, a side wall, a clinch and a tire using the rubber composition.

Abstract: A pneumatic tire has a carcass and a belt reinforcing structure. The belt reinforcing structure includes a sine wave belt layer having a first and second axially outer edge, wherein the belt is laid up in a sine wave pattern which extends from a first edge to a second edge. Preferably the belt is laid up in strips of reinforced rubber having two or more cords, wherein the reinforcement cords are made of a high elongation cable.

Abstract: A pneumatic tire is described which includes a tread, a carcass and a belt structure interposed between the carcass and the tread. The belt structure includes a pair of working belts, wherein the angle of the working belts range from about 15 degrees to about 30 degrees, wherein the belt structure further includes a zigzag belt structure located between the working belts. The zigzag belt structure is formed of at least two layers of cords interwoven together from a strip of rubber reinforced with one or more cords, wherein the strip forming the zigzag belt structure is layed up in a first zigzag winding extending from a first lateral belt edge to a second lateral belt edge in a zigzag wavelength having a first amplitude W1 followed by a second amplitude W2, and a second zigzag winding formed of a zigzag wavelength having a first amplitude W2 followed by a second amplitude W1.

Abstract: This invention relates to a light duty tire (e.g. passenger tire or light duty truck tire) designed for a load bearing capacity of a maximum of 3,500 pounds (1587 kg) with a tread of a cap/base construction with at least one underlying silica-rich, cis 1,4-polyisoprene rubber based intermediate transition rubber layer to promote a reduced internal heat generation for the light duty tire and to therefore promote a light load carrying light duty tire which is more durable for the long haul. Such light duty tire tread is intended for use with light loads in which internal heat may be generated within the tire, including the tire tread, during use.

Abstract: This invention relates to a heavy duty tire (e.g. heavy duty truck tire) designed for a load bearing capacity of at least 4,000 pounds (1814 kg) with a tread of a cap/base construction with at least one underlying silica-rich, cis 1,4-polyisoprene rubber based intermediate transition rubber layer to promote a reduced internal heat generation for the heavy duty tire and to therefore promote a load carrying heavy duty tire which is more durable for the long haul. Such heavy duty tire tread is intended for use with heavy loads in which internal heat is expected to be generated within the tire, including the tire tread, during use.

Abstract: A tire 2 has a belt 14 and a hard rubber layer 16. The belt 14 has a first ply 26, a second ply 28, a third ply 30 and a fourth ply 32. A width W3 of the third ply 30 is smaller than a width W1 of the first ply 26 and a width W2 of the second ply 28, and 75% of a width of a tread. Each of the plies 26, 28, 30, 32 has a steel cord. The first ply 26 and the second ply 28 construct a cross-ply structure. A cord of the third ply 30 is wound spirally. The third ply 30 has what is referred to as a jointless structure. The hard rubber layer 16 is positioned between the first ply 26 and the second ply 28, and outward of the third ply 30 in an axial direction. A complex elastic modulus of the hard rubber layer 16 is equal to or greater than 30 MPa.

Abstract: A pneumatic tire 1 having improved uniformity and durability and including a toroidal carcass 6 extending from a tread portion 2 to each of bead cores 5 in bead portions 4 through sidewall portions 3, a belt layer 7 disposed radially outward of the carcass 6 in the tread portion 2, and a cushion rubber 9 having an approximately triangular cross section disposed between the carcass 6 and each of axial edge portions 7E of the belt layer 7, and a method for producing the same, wherein the cushion rubber 9 is made from a strip laminated body formed by circumferentially and spirally winding a first ribbon-like unvulcanized rubber strip and a second ribbon-like unvulcanized rubber strip having a different composition from that of the first rubber strip.