Abstract: The method of designing a bead flange profile (24) for a pneumatic tire (30) to be mounted on a design rim (40) as specified for the tire size has the steps of (a) selecting a design rim and a cured tire construction and bead profile (33); (b) predicting or measuring the tire deformation upon mounting and inflation; (c) analyzing the deformation to show the compressed beat seat profile (23) and the bead flange profile (24) contacting the rim flange; (d) identifying any gaps between the tire (30) and the rim (40); (e) modifying the tire's bead flange profile (24) to eliminate any gaps by moving selected points on the bead flange profile (24) in proportion to the local gap sizes; (f) shifting all modified points axially inward by a distance so that the molded base width remains the same as the original profile (24); and then (g) smoothing the connections between the modified portion and the rest of the bead profile (33).

Abstract: A heavy duty radial tire comprises: a carcass ply turned up around a bead core in each bead portion from the inside to outside of the tire so as to form a pair of turnup portions and a main portion therebetween; a bead apex rubber disposed between each of the turnup portions and the main portion, each. of the turnup portions extending radially outwardly beyond a radially outer end of the bead apex to adjoin the main portion; a chafer rubber disposed along at least an axially outer surface of each of the bead portions so as to define at least a flange-contacting part for contacting with a flange of a wheel rim; the height of the radially outer end of the bead apex being in the range of from 7 to 35% of the height of the carcass at the tire equator and being less than the height of the radially outer end of the chafer rubber; and the flange-contacting part being devoid of a concave profile. When the carcass ply is made of steel cords whose sectional area is in the range of from 0.10 to 0.25 sq.

Abstract: A tire for a vehicle wheel includes a toroidal carcass, a tread band, and a first inductive element of an electrical generator. At least one tire bead includes an annular core including a steel strip spirally wound to form at least two radially-superposed layers. The first inductive element includes at least one turn of conducting wire wound around a transverse profile of one of the annular cores. Alternatively, at least one tire bead includes an annular core including a matrix based on an elastomeric or plastomeric material, the matrix incorporating fibers, yarn, or cords, and containing ferromagnetic material in at least one of a powder form or a fibril form. The tire may include at least one electronic circuit operatively coupled to the first inductive element. A system for sensing and signaling one or more parameters associated with the tire and a method for producing the tire are also disclosed.

Abstract: A pneumatic radial tire having an aspect ratio of no more than 60% comprises at least one carcass ply composed of a main body portion and a turn-up portion, a stiffener made of a soft rubber stock and a hard rubber stock, and a reinforcing member extending at an outside of the turn-up portion in a widthwise direction of the tire through a cushion rubber, wherein at an inflation state of the tire under a given air pressure, a height of an outer end of the turn-up portion in the radial direction is no more than 0.33 times a section height of the carcass ply, and a thickness ratio (d2/d1) is within a range of 1.2-1.8.

Abstract: A tire, at least one radial carcass reinforcement of which is anchored within each bead B to two bead wires and to form an upturn, characterized in that, viewed in meridian section, an additional reinforcement armature, formed of at least one ply of circumferential reinforcement elements, is placed, at least axially to the inside, along the carcass reinforcement in the region of the bead B.

Abstract: A tire, at least one radial carcass reinforcement of which is anchored within each bean B to a bead wire to form an upturn, characterized in that, viewed in meridian section, the carcass reinforcement has a meridian profile, in the region of the point of inflection J between the convex part and the concave part, which is reinforced axially to the inside by an additional reinforcement armature composed of at least one ply formed of circumferential metal elements.

Abstract: A tire comprising a tread at least one radialIy outermost reinforcing layer of belt reinforcing textile cords arranged substantially at a zero angle with respect to the mid circumferential center plane perpendicular to the axis of the tire, a carcass a tread compound which is in direct contact with the radially outward side of the cords.

Abstract: A tire has at least one radial carcass reinforcement anchored within each bead B to at least one bead wire to form an upturn, wherein the carcass reinforcement meridian profile trace between a point A of greatest axial width and a point of tangency T with the circle circumscribed on the coating layer of the anchoring bead wire is convex over its entire length, and the thickness &egr; of the bead B, measured on a line perpendicular to the meridian profile at a point C of height hc of between 30 and 40 mm and measured to the base YY′, is between 2.5 and 3.0 times the thickness e of the sidewall measured on a straight line D″ of greatest axial width, an additional reinforcement armature of at least one ply of circumferential reinforcement elements being arranged axially to the inside of the carcass reinforcement non-upturned part.

Abstract: A thread 4, intended to form a carcass reinforcement for a tire, is laid in contiguous hoops on a rigid core 1 by a system with a single oscillating arm transporting an orifice 6 so as to enable the orifice 6 to pass over a core 1 and come as near as possible to each bead of the tire, in order to lay adjacent hoops.

Abstract: In a pneumatic tire, a cord spacing between an axially outer cord layer and an axially inner cord layer such as: a turnup portion and a main portion of a carcass ply; or a bead reinforcing cord layer and a carcass ply turnup portion, is increased from the radially inside to the outside of the tire to improve the durability of the bead portion.

Abstract: A radial ply pneumatic tire (10) features a bead core (20) which comprises an arrangement of filaments (26) positioned relative to one another. The bead core (20) has a cross-section and a radially inward base side (44). In the cross section, the base side (44) of the bead core (20) has a width which is substantially linear and is between 50% to 75% of the rim seat width. The bead core base side (44) is inclined at least 15° relative to the bead's axis of rotation, while the bead heel surface has an as molded inclination at the central portion (61) radially inward of the bead base (44) at an angle of at least 10° with respect to the bead's axis. The tire (10) further has a unique toeguard chafer (66) compound that is cut resistant.

Abstract: The anchoring of the carcass reinforcing elements 1 is assured by circumferential cables 2, with the interposition of a connecting rubber composition 3. The circumferential cable 2 is arranged in several turns forming one or more helices. These circumferential cables have an operational elongation rate Af=Ae+Ap of more than 4%. This operational elongation rate does not include the specific elongation As of the “cable” effect. The maximum stress Rm of the cable 2 is preferably more than 2000 MPa. The cables have undergone a heat treatment which has, in combination, the features of being a recovery annealing treatment and which is carried out directly on cable comprising wires previously separately covered by an adherent coating.

Abstract: A pneumatic tire is provided in at least one of sidewall portions with a wheelrim protector which overhangs a flange of a wheelrim and protrudes axially outwardly from the axially outer end of the flange, the wheelrim protector is provided with at least one circumferential slit around the axis of the tire. In case of a slit extending continuously in the tire circumferential direction, the slit can be formed in a wedge-shaped cross sectional shape. In case of discontinuous slits, the slits are arranged around the tire axis and inclined with respect to the adjacent carcass cords at 45 to 80 degrees.

Abstract: A tire (1), a mounting rim (2) therefor and a circumferentially unstretchable ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23′, 23″) on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the supporting ring (3) and rim flange (24).

Abstract: A tire (10) has three carcass reinforcing structures (15, 16, 17). The second carcass reinforcing structure (16) is folded radially outwardly around each bead core 16 (20), so that the edges (36) of the second carcass reinforcing structure (16) are each located between an apex (31) and the neighboring bead core. The third carcass reinforcing structure (17) has its turndown portions (27) folded radially inwardly around the turnup portion of the second carcass reinforcing structure (16) and the bead core, so that the edges (37) of the plies of the third carcass reinforcing structure are located at the radially inner side of the bead cores (20).

Abstract: A chipper (40, 43, 54) for use in a pneumatic radial ply runflat tire (49) comprises cord reinforcements (42, 42′) making an angle, &agr;′ of between 30° and 50° relative to the circumferential direction. The radially outermost edge (46, 50) of the chipper is located between 10 and 15 millimeters above the wheel rim flange (56) of the wheel-mounted tire and between 5% and 20% of the section height SH of the tire. The chipper is disposed axially inward of the ply turnup end (58). The chipper (40) may comprise a single layer of cords (42), or the chipper (43) may comprise two layers (47, 47′) with the -cords (42, 42′) in the two layers being crossed to form mirror images across a radial reflection axis.

Abstract: A heavy-duty pneumatic radial tire and rim assembly ha s a support ring within the tire to support the tire in a deflated condition, wherein the inner diameter Di of the inside bead portion which is inside with respect to the vehicle is substantially 80 to 200 mm larger than the inner diameter Do of the outside bead portion.

Abstract: An improved track belt tire is constructed of a removable tread belt assembly mounted to the outer circumferential surface of a multi-layered tire carcass with an embedded carcass ply having ply turnup ends about the bead wires. The outermost ends of the first and second turnup ends being located radially outward at a distance equal to between about 2 and 3 times the diameters of the bead wires so that the ends of the turnup ends are supported by the flange ends of the tire rim when a tire carcass mounted to the tire rim is deflected. The turnup ends are also supported by first, second, third, and fourth apex elements disposed about each of the bead wires. The ply line of the carcass ply can also follow the natural ply line.

Abstract: A heavy duty radial tire comprises a carcass ply being turned up around bead cores form the axially inside to outside of the tire, a bead apex disposed between the carcass main portion and each turnup portion, the turnup portion extending radially outwardly beyond the radially outer end of the bead apex so that the turnup portion has a parallel part which is placed adjacent to and substantially in parallel with the main portion, and a chafer disposed in each bead portion and extending radially outwardly beyond the radially outer end of the bead apex along the axially outside of the turnup portion.

Abstract: A pneumatic radial tire includes a bead portion having a plurality of bead cores, and one or plural radial carcass plies wound up from a tire inner side toward an outer side at the respective bead cores. One-half or more of the number of end portion(s) of the radial carcass ply (plies) wound up on the bead cores is/are positioned at each bead core within a range of 35 to 55% of a tire section height as measured from the reference line of the tire section height. In accordance with this structure, rigidity from the bead portion to a side portion of the tire markedly improves. Accordingly, even when the tire is large and a load applied thereto is increased, deformation of the bead portion in the loaded state is suppressed, a strain level of the bead portion is reduced, and excellent durability of the bead portion is ensured.

Abstract: A tire having a preferential fitting direction to a passenger car, the tire having a carcass reinforcement that extends from one tire bead to the other and, radially outside, a crown reinforcement of width Ls, formed by at least two crown plies, and in addition a meridian reinforcing ply arranged radially between the carcass reinforcement and the crown reinforcement, the meridian reinforcing ply having a width Lr between 15% and 45% Ls of the crown reinforcement, one edge of the reinforcing ply being located a distance D1 from the equatorial plane of the tire between 35% and 50% of Ls, while the other edge is located between the first edge and the equatorial plane of the tire. A method of mounting a group of four such tires on a vehicle.

Abstract: A tire having at least one reinforcement ply formed of reinforcement elements embedded in vulcanized rubber, characterized in that the reinforcement elements for said ply are individually coated in a rubber mix (B, B1), referred to as “coating mix”, having a given composition and physical properties, the reinforcement elements arranged parallel to each other being covered on one face by a first rubber layer (A, A1), referred to as “first calendering layer”, of constant composition and properties, whereas the elements are covered on the opposite face by a second rubber calendering layer (C, D), of composition and properties which are variable according to the meridian position on the ply within the tire.

Abstract: A pneumatic tire comprises a bead core and a rubber bead apex provided in each bead portion, and a carcass comprising a carcass ply turned up around the bead core from the inside to the outside of the tire to form a pair of turned up portions and a main portion therebetween. The bead apex is made of hard rubber disposed between the main portion and turned up portion and extending radially outwards from the bead core. The length (LA) of the bead apex is in a range of from 0.1 to 0.25 times the tire section height (H). A reinforcing cord layer is disposed along the axially inside of the turned up portion. The radially outer end (FU) of the reinforcing cord layer is positioned radially outside the radially outer end (BU) of the bead apex but radially inside the maximum tire section width point (M). The radially inner end (FD) of the reinforcing cord layer is positioned radially outside the radially outer end of the bead core but radially inside the radially outer end (BU) of the bead apex.

Abstract: A radial ply pneumatic tire 30 has a unique cross sectional profile. The tires rum flange width W is greater than the tread width TW and the maximum section width SW is located radially less than 50% of the section height SH as measured from the nominal rim diameter ND.

Abstract: An improved track belt tire is constructed of a removable tread belt assembly mounted to a tire carcass with an embedded carcass ply having ply turnup ends about the bead wires. First, second, third, and fourth apex elements are disposed about each of the bead wires. The first of the apex elements is located adjacent and radially outward from each of the bead wires. The second of the apex elements is located between the overlying sides of the turnup ply. The third of the apex elements is disposed against the axially inwardly facing sides of the turnup ends of the carcass ply and the fourth of the apex elements is located against outwardly facing sides of the ply turnup ends of the carcass ply to encase the end portions of the ply turnup ends between the second and fourth apex elements.

Abstract: A heavy duty pneumatic radial tire has a light weight of a bead portion and an excellent bead portion durability and is provided with a bead portion reinforcing layer covering an outer surface of a carcass ply around a bead core, in which the bead portion reinforcing layer is comprised of a single rubberized steel cord layer or of two or three independent rubberized steel cord layer segments. In this case, the steel cords arranged in the bead portion reinforcing layer have an inclination angle of a given range with respect to a circumferential line of the tire.

Abstract: A tire includes a carcass, a tread band, at least a reinforcing belt between the tread band and the carcass, a pair of bead cores disposed one at each end of the carcass with ends of the carcass wrapped around the pair of bead cores to form a pair of beads, and at least one clamp disposed around each bead core, wherein the at least one clamp is made of a shape-memory material. A bead core including at least one clamp made of a shape-memory material, a method for manufacturing a tire including at least one clamp made of a strip of shape-memory material, and a method for manufacturing a bead core including at least one clamp made of a strip of shape-memory material are also disclosed.

Abstract: In a tire for vehicles, the formation of each bead reinforcing structure envisages that, after laying of a first series of elongated sections defining axially inner terminal zones of a carcass ply, an annular anchoring insert consisting of a wire wound in axially adjacent turns is formed on an end portion directed axially towards the outside of the respective zone. A stiffening element tapering radially away from the axis of the tire is then formed on each inner terminal zone. A second series of elongated sections is then laid, completing the manufacture of the carcass ply with the formation of axially outer terminal zones which are superimposed on the stiffening elements. An additional annular insert is formed on an end portion of each outer terminal zone arranged radially superimposed on the anchoring insert.

Abstract: A tire having a radial carcass reinforcement which, viewed in meridian section, has a bead, the seat of which is inclined towards the outside, the bead heel being axially to the inside and being reinforced by at least one reinforcement element, the bead toe being axially to the outside and having a profiled element of rubber mix in the form of a wedge defined by two sides, the mix having a Shore A hardness greater than the Shore A hardness(es) of the rubber mixes radially above, characterized in that the radial carcass reinforcement in the bead winds around the annular element from the inside to the outside to form an upturn, the end of which is located on one hand axially to the outside of a straight line P2 perpendicular to the axis of rotation and passing through the center of gravity of the meridian section of the element, and on the other hand axially to the inside and radially to the outside of the straight line P1 supporting the radially outer side of the profiled element.

Abstract: A pneumatic tire comprises a bead portion, a carcass wound around a bead core having a polygonal form from an inside of a tire toward an outside thereof in a radial direction and a bead filler arranged on an outer periphery of the bead core, wherein a reinforcing layer comprised of an organic fiber cord(s) or a metal wire(s) extended substantially in a circumferential direction of the tire is arranged in a position adjacent to the bead filler.

Abstract: In a pneumatic radial tire for trucks and buses mounted on an approved 15° drop center rim, an outer surface portion of a composite side-rubber and/or an envelope surface of the bead core among members constituting the bead portion of the tire has a curved shape concavedly directed toward the outside of the tire at a region opposite to an inner curved surface of a slantly rising portion in a flange of the approved rim.

Abstract: A bead core is formed by spirally winding a single cord and stacking spiral windings to each other, wherein a winding start end of the single cord is shifted from an axially outermost or innermost position of a radially innermost first stage to a next position at least corresponding to only one of the single cord in the stacking of the spiral windings.

Abstract: A tire having a radial carcass reinforcement, anchored in each bead to an anchoring bead wire to form an upturn, characterized in that a profiled member of vulcanized rubber mix is arranged axially to the outside of the upturn of the carcass reinforcement, the secant modulus of elasticity in tension of which, measured for a relative elongation of 10%, is very much greater than the moduli of the other mixes forming the bead, the main part of the carcass reinforcement having a substantially rectilinear meridian profile between its point of tangency to the anchoring bead wire and a point A located at a radial distance HA from the base D of the beads of between 35% and 65% of the radial distance HE between the points of maximum axial width of the carcass reinforcement and said base D.

Abstract: A radial tire when mounted on a rim and filled to normal inner pressure has a ratio of the upper cross-sectional height USH to the cross-sectional height SH between 0.50 and 0.59, a ratio of the lower cross-sectional height LSH to SH between 0.40 and 0.50, a rim width of more than 1.40 times the measuring rim width MRW but less than 1.45 MRW, an aspect ratio of less than 0.65, a beadfiller height of greater than 0.224 SH, and an angle between the tangent to the carcass line at a bead upper point B and a line extending in parallel with the rotation axis of the tire is less than 45°.

Abstract: The carcass structure of a tire comprises one or more carcass plies each formed of strip lengths comprising longitudinal thread elements incorporated in a layer of elastomer material. The strip elements have respective crown portions disposed circumferentially in mutual side-by-side relationship, and side portions extending radially at the tire sidewalls. The side portions of each carcass ply are each at least partly covered with at least one of the side portions belonging to an adjacent deposition length. Associated with the carcass plies are annular structures comprising a pair of inextensible inserts in the form of an annulus which are anchored to the first and second carcass plies respectively and axially separated by an elastomeric filling body. A belt structure, a tread band, and sidewalls are combined with the carcass structure to define the tire.

Abstract: A heavy duty radial tire has a carcass including a carcass ply made of cords arranged at an inclination angle of 70 to 90 degrees with respect to the tire equator, the carcass ply including a main portion extending from a tread portion to a bead core in a bead portion and integrally provided with a turnup portion turned up from the axially inside to the outside at the bead core, a bead apex disposed between the main portion and turnup portion of the carcass ply, wherein the turnup portion extends radially outwardly along the axially outer surface of the bead apex and has a portion extending substantially parallel with and adjacent to the carcass ply main portion from the radially outer end of the bead apex, and the length L of the parallel portion is 1.0 to 8.0 times the maximum section width CW of the bead core.

Abstract: A pneumatic radial tire having in axial cross-section a highly curved tread is reinforced by a breaker assembly with improved resistance to breaker edge looseness. The breaker assembly includes one breaker ply which extends between two bead regions and has its edges disposed between a carcass main portion and a carcass turn-up portion. An improved single-stage method may be employed for building the tire.

Abstract: A pneumatic tire comprises a cord-reinforced layer such as carcass, belt, bead reinforcing layer which is made of metallic cords, each metallic cord is made up of six to twelve metallic filaments whose diameter is in a range of from 0.15 to 0.45 mm, the metallic filaments include waved filaments and unwaved filaments, each waved filament is two-dimensionally waved at a wave pitch and wave height before twisted, the wave pitch is in a range of from 5.0 to 35.0 times the diameter of the filament, and the wave height is in a range of from 0.2 to 4.0 times the diameter of the filament, and the metallic filaments are twisted together into the cord at a twist pitch of from 10 to 40 mm so that the two-dimensionally waved filaments are each subjected to a certain rotation around its axial.

Abstract: A pneumatic radial tire comprises a carcass of at least one rubberized cord ply having a main carcass body and a turnup portion, and a stiffener rubber taperingly extending between the main carcass body and the turnup portion toward an end of the tread portion, wherein the stiffener rubber comprises a hard stiffener rubber member located near to the main carcass body and a soft stiffener rubber member located along the turnup portion over the hard stiffener rubber member, and the hard stiffener rubber member convexly projects toward the outside of the tire at a cross-section of the tire in a region between a normal line LV and a line segment LH, and a height of the hard stiffener rubber member from the outer surface of the main carcass body on a normal line L is maximum in a region from the line segment LH toward the end of the tread portion.

Abstract: A pneumatic tire comprises a pair of axially spaced bead portions with a bead core, and a carcass comprising a main portion extending from one of the bead cores to the other. In a state that the tire is mounted on a standard rim and inflated to a standard pressure but loaded with no tire load, a carcass line inclination angle &agr; is set in the range of not more than 20 degrees. The carcass line inclination angle &agr; is defined as an angle with respect to the tire radial direction, of a straight line (X) drawn between a first point (P1) and a second point (P2). The first point (P1) is an intersecting point between an axial line (K2) passing a bead heel point, and a tangent to a carcass line at a radial height of the radial center of the bead core. The second point (P2) is a point on the carcass line at a radial height of a flange of the standard rim. The carcass line is a thickness center line of the carcass main portion.

Abstract: A tire (10) having a contoured precured bead filler or apex (40) with a contoured surface for directing the ply path (24A) of the cord reinforced carcass plies (24) is taught. The contour of the precured bead filler or apex (40) has a convex surface (42A) and concave surface (42B) that transition at an inflection location (T) at or below the rim flange (52) to which the tire (10) is to be mounted.

Abstract: A tire wherein one or more rubberized organic fiber cord layers extending over an end of a carcass turnup portion in a radial direction of the tire are arranged so as to extend from a position near to an outside of the bead core over the end of the turnup portion toward the outside of the tire and spread apart to the turnup portion. A tire wherein one or more rubberized organic fiber cord layers are arranged so as to extend from a position exceeding over an end of a bead portion reinforcing layer made of a steel cord layer toward the outside of the tire extending over the end of the turnup portion in the radial direction of the tire and spread apart to the reinforcing layer. And also, a tire wherein a cord layer portion of one or more rubberized organic fiber cord layers extending over the end of the turnup portion in the radial direction of the tire and outside the turnup portion has a first bent portion bending toward the inside of the tire.

Abstract: A pneumatic tire is disclosed, which comprises: (1) a reinforcing rubber layer made of short fiber reinforced rubber, alternatively (2) a reinforcing rubber layer having hardness set in a range of 90° to 99° of JIS-A hardness, which is arranged in an area of a bead section from a bead toe section along a tire inner wall surface, and wherein a chafer composed of a non-metallic fiber cord having a high strength and a high elastic modulus is provided to cover an outer side of the reinforcing rubber layer from the tire inner wall surface to the bead toe area.

Abstract: Disclosed is a pneumatic tire which comprises a carcass layer provided between a pair of left and right bead sections, left and right side wall sections interpolated for connecting the pair of left and right bead sections with a tread section to be continuous, and at least two belt layers provided in an outer peripheral side of the carcass layer in the tread section, each of the belt layers being composed of a plurality of reinforcing cords coated with coating rubber. Storage elastic modulus E′ of the coating rubber is set in a range of 15.0 to 40.0 MPa, and its loss tangent tan &dgr; is set in a range of 0.1 to 0.25. Interlayer rubber is provided between end parts of the belt layers, the interlayer rubber being specifically set in each of both end parts thereof in a tire width direction, and elongation to break Eb of the interlayer rubber is set in a range of 400 to 700%.

Abstract: A heavy duty pneumatic radial tire has a light weight of a bead portion and an excellent bead portion durability and is provided with a bead portion reinforcing layer covering an outer surface of a carcass ply around a bead core, in which the bead portion reinforcing layer is comprised of a single rubberized steel cord layer or of two or three independent rubberized steel cord layer segments. In this case, the steel cords arranged in the bead portion reinforcing layer have an inclination angle of a given range with respect to a circumferential line of the tire.

Abstract: A pneumatic tire comprises a carcass ply extending between bead portions and is turned up around a bead core in each bead portion to form two turnup portions and a main portion therebetween; each of the turnup portions extends radially outwardly and adjoins the main portion from a certain height above the bead core; a space is surrounded by the carcass ply main portion, and each turnup portion and the bead core is filled with a small size bead apex rubber or a gas; and the bead portion is provided between the carcass ply and the bead core with a bead core cover for preventing the carcass cords from direct contacting with the bead core.

Abstract: A composite cord is provided which is simple in manufacture, highly productive, less costly, and improved in rubber penetration. The composite cord has a 1×n construction (n is an integer from 3 to 12) with 2 to 11 metallic filaments and 1 to 5 polymer fibers having a melting point of 50 to 200 degrees twisted together. The pneumatic tire employing this composite cord for its reinforcing element is restricted in rust formation and improved in strength retention.

Abstract: A pneumatic tire has an outer surface provided with a mid-lower sidewall contour S1 and a lower sidewall contour S2, the contour S1 extends radially inwardly from the maximum cross sectional width point P1 of the tire to a point P12 along a circular arc line E1 having a single radius R1 and the center on an axial line passing the maximum cross sectional width point P1, the contour S2 extends on the axially inside of the circular arc line E1 from the point P2 to a radially inner point P3, the rubber thickness T measured from the tire outer surface to the main portion of a carcass is gradually increased from the point P1 to the point P2.

Abstract: A pneumatic tire comprising a rubber member containing a short fiber (A′) formed by the fibrillation of a short fiber (A) whose cross section takes a sea-island structure essentially composed of at least two polymers.

Abstract: A tire wherein one or more rubberized organic fiber cord layers extending over an end of a carcass turnup portion in a radial direction of the tire are arranged so as to extend from a position near to an outside of the bead core over the end of the turnup portion toward the outside of the tire and spread apart to the turnup portion. A tire wherein one or more rubberized organic fiber cord layers are arranged so as to extend from a position exceeding over an end of a bead portion reinforcing layer made of a steel cord layer toward the outside of the tire extending over the end of the turnup portion in the radial direction of the tire and spread apart to the reinforcing layer. And also, a tire wherein a cord layer portion of one or more rubberized organic fiber cord layers extending over the end of the turnup portion in the radial direction of the tire and outside the turnup portion has a first bent portion bending toward the inside of the tire.