Each of at least two layers of a carcass reinforcement has a breaking force per unit width higher than 2250 daN/dm. The minimum strength per unit width, measured for an elongation of less than 10%, of a second layer of carcass reinforcement is strictly greater than a value equal to 20% of the minimum strength per unit width, measured for an elongation of less than 10%, of a first layer of carcass reinforcement. The reinforcing elements of the two layers of carcass reinforcement have a thread count of less than 750 tex. The elongation of the reinforcing elements of the second layer of carcass reinforcement is greater than 4% under a force of 20 daN, and the secant elastic modulus values under tension at 10% elongation, Mt, Mj, satisfy the relationship Mt/Mj1.

The invention relates to a process for manufacturing a tire (1). The process includes the steps a): forming a carcass (3) from at least one first material based on thermoplastic elastomer, b): forming, on the carcass (3), at least bead zones (10) from at least one second material based on thermoplastic elastomer and c): forming, on the assembly obtained during step b), an additional part from at least one third material based on thermoplastic elastomer.

Provided is a tire (10) including: a tire frame member (12) made of a resin; a reinforcing layer (16) that includes plural reinforcing cords (17) coated with a rubber material, and that is arranged on a tire radial-direction outer side of the tire frame member (12); and an adhesive layer (18) that contains a resin material, and that is arranged between the tire frame member (12) and the reinforcing layer (16).

Provided is a tire including a spiral cord layer formed by spirally winding a reinforcing cord, in which tire the occurrence of uneven wear attributed to the spiral cord layer is suppressed. The tire includes: a carcass (14) which toroidally extends between a pair of bead portions; and a spiral cord layer (1) which is arranged on the tire radial-direction outer side of the carcass in a crown portion and in which an upper layer (1A) and a lower layer (1B) are formed by spirally winding a reinforcing cord. At least one circumferential belt-reinforcing layer (17), whose cord direction is substantially a tire circumferential direction, is arranged on the tire radial-direction outer side of the spiral cord layer, and a tire widthwise length We of the circumferential belt-reinforcing layer is in a range of 40% to 90% of a tire widthwise length Ws of the spiral cord layer.

A run-flat tire has: a pair of bead cores; a carcass that straddles the pair of bead cores, and having end portions that are anchored on the bead cores; bead fillers that are made of resin and that extend from the bead cores along an outer surface of the carcass toward an outer side in a tire radial direction; and side reinforcing rubbers that are provided at tire side portions, and that extend in a tire radial direction along an inner surface of the carcass.

In a pneumatic tire 2, a contour of an outer surface of each side portion includes a first segment that is a straight line or a circular arc, and a second segment that is a straight line or a circular arc and that is connected to an end of the first segment. The contour of the outer surface of the side portion bends outward with a connection point of the first segment and the second segment as a bending point. The first segment and the second segment are preferably straight lines.

A tire including an annular tire frame composed of a plurality of resin materials, wherein an Asker D hardness Ho of a side portion of the tire frame, which side portion is to be located on an outer side in a vehicle width direction when the tire is mounted on a vehicle, is lower than an Asker D hardness Hi of a side portion of the tire frame, which side portion is to be located on an inner side in the vehicle width direction when the tire is mounted on the vehicle, and wherein a resin contained as a main component in a resin material constituting the side portion of the tire frame, which side portion is to be located on the inner side in the vehicle width direction when the tire is mounted on the vehicle, has a melting point of 140 C. or higher, or does not have a melting point and has a glass transition point of 40 C. or higher.

A tire including an annular tire frame composed of a plurality of kinds of resin materials, wherein an Asker D hardness Hi of a side portion of the tire frame, which side portion is to be located on an inner side in a vehicle width direction when the tire is mounted on a vehicle, is 0.84 times or more but less than 1.00 times an Asker D hardness Ho of a side portion of the tire frame, which side portion is to be located on an outer side in the vehicle width direction when the tire is mounted on the vehicle.

A tire includes a tread, a sidewall extending from one edge of the tread approximately in a radially inward direction to a bead structure, and a carcass extending along an axially inner side of the sidewall to the bead structure. The carcass includes a first ply and a second ply extending radially inward from the sidewall to a terminal end directly adjacent the bead structure. The bead structure includes a circumferentially extending bead core axially inward of the sidewall, a chafer extending radially inward toward the bead core, an apex abutting the bead core, and an inner stiffener member disposed between the first ply and the apex, the inner stiffener member extending radially outward from a location proximate the bead core to a location radially outward from the apex.

A tire includes a tread, a sidewall extending from one edge of the tread approximately in a radially inward direction to a bead structure, and a carcass extending along an axially inner side of the sidewall to the bead structure. The carcass includes a first ply and a second ply extending radially inward from the sidewall to a terminal end directly adjacent the bead structure. The bead structure includes a circumferentially extending bead core axially inward of the sidewall, a chafer extending radially inward toward the bead core, an apex abutting the bead core, and an inner stiffener member disposed between the first ply and the apex, the inner stiffener member extending radially outward from a location proximate the bead core to a location radially outward from the apex.