A tire for a two-wheeled motorized vehicle includes a tread joined by two sidewalls to two beads, the tread having first and second elastomer compositions, crown reinforcement, radially inside tread having a crown layer having mutually parallel circumferential reinforcers forming an angle at most equal to 5° to the circumferential direction, a carcass reinforcement, radially inside crown reinforcement, having turnup. Carcass reinforcement includes mutually parallel reinforcers, and wrapped, in each bead, from the inside to the outside of the tire, about bead wire in order to form turnup having free end E.sub.2. Carcass reinforcement includes crown portion and lateral portion, crown portion extending axially between first and second ends E.sub.2, E′.sub.2, E.sub.2 and E′.sub.2 being symmetric to equatorial plane P of the tire, lateral portion extending symmetrically to equatorial plane P radially towards the inside, from radially outermost end E.sub.2 to fourth end E.sub.4 disposed at the bead wire.

A tire for a two-wheeled motorized vehicle includes a tread joined by two sidewalls to two beads, the tread having first and second elastomer compositions, crown reinforcement, radially inside tread having a crown layer having mutually parallel circumferential reinforcers forming an angle at most equal to 5° to the circumferential direction, a carcass reinforcement, radially inside crown reinforcement, having turnup. Carcass reinforcement includes mutually parallel reinforcers, and wrapped, in each bead, from the inside to the outside of the tire, about bead wire in order to form turnup having free end E.sub.2. Carcass reinforcement includes crown portion and lateral portion, crown portion extending axially between first and second ends E.sub.2, E′.sub.2, E.sub.2 and E′.sub.2 being symmetric to equatorial plane P of the tire, lateral portion extending symmetrically to equatorial plane P radially towards the inside, from radially outermost end E.sub.2 to fourth end E.sub.4 disposed at the bead wire.

A pneumatic tire comprises a carcass which comprises a carcass ply composed of a main portion extending between bead portions and a pair of turned-up portions turned-up around respective bead cores. The bead portion is provided with: a primary bead apex rubber disposed between the carcass-ply main portion and the carcass-ply turned-up portion; an insulation rubber layer extending radially outwardly through between the carcass-ply main portion and the carcass-ply turned-up portion; and a subsidiary bead apex rubber layer disposed on the axially outside of the carcass-ply turned-up portion. The radially outer edge of the insulation rubber layer is located radially outside the radially outer edge of the subsidiary bead apex rubber layer. The complex elastic modulus of the insulation rubber layer is equal to or greater than the complex elastic modulus of the topping rubber of the carcass ply.

A pneumatic tire comprises a carcass which comprises a carcass ply composed of a main portion extending between bead portions and a pair of turned-up portions turned-up around respective bead cores. The bead portion is provided with: a primary bead apex rubber disposed between the carcass-ply main portion and the carcass-ply turned-up portion; an insulation rubber layer extending radially outwardly through between the carcass-ply main portion and the carcass-ply turned-up portion; and a subsidiary bead apex rubber layer disposed on the axially outside of the carcass-ply turned-up portion. The radially outer edge of the insulation rubber layer is located radially outside the radially outer edge of the subsidiary bead apex rubber layer. The complex elastic modulus of the insulation rubber layer is equal to or greater than the complex elastic modulus of the topping rubber of the carcass ply.

A motorcycle tire comprises a carcass having a bias structure, a band comprising a jointiess ply, and a tread rubber disposed on the radially outside of the band. The loss tangent of the tread rubber at a temperature of 0 deg C. is larger in a tread crown region than in tread shoulder regions. The carcass comprises an outer carcass ply of carcass cords. The angles of the carcass cords with respect to the tire circumferential direction are smaller in the tread crown region than in the tread shoulder regions.

A tire having a crown reinforcement (5), comprising at least one crown layer (51), and a carcass reinforcement (6), comprising at least one turned-up carcass layer (61), the turned-up carcass layer (61) comprising mutually parallel reinforcers turned up, within each bead, from the inside towards the outside of the tire around a bead wire (7), to form a turn-up (8) comprising a free end (E). The turned-up carcass layer (61) comprises a crown portion (611) and a lateral portion (612), the crown portion (611) extending axially between a first and a second end (E.sub.1, E′.sub.1) which is symmetric about the equatorial plane (P), the lateral portion (612) extending radially inwards, from a first end (E.sub.2) as far as a second end (E3). The reinforcers of the lateral portion (612) and the reinforcers of the turn-up (8) form, with the circumferential direction (X), specified angles.

A tire having a crown reinforcement (5), comprising at least one crown layer (51), and a carcass reinforcement (6), comprising at least one turned-up carcass layer (61), the turned-up carcass layer (61) comprising mutually parallel reinforcers turned up, within each bead, from the inside towards the outside of the tire around a bead wire (7), to form a turn-up (8) comprising a free end (E). The turned-up carcass layer (61) comprises a crown portion (611) and a lateral portion (612), the crown portion (611) extending axially between a first and a second end (E.sub.1, E′.sub.1) which is symmetric about the equatorial plane (P), the lateral portion (612) extending radially inwards, from a first end (E.sub.2) as far as a second end (E3). The reinforcers of the lateral portion (612) and the reinforcers of the turn-up (8) form, with the circumferential direction (X), specified angles.

A method for manufacturing an annular carcass of a tire includes providing first and second ply materials, each including cords; winding at least a layer of the first ply material and a layer of the second ply material onto a carcass drum so the first ply material radially surrounds the second ply material; arranging two cables onto the cylindrical carcass preform; turning the part of the cylindrical carcass preform about the closer cable onto the part of the cylindrical carcass preform between the two cables; and expanding the cylindrical carcass preform to form an annular carcass having, in a bead area, inner and outer layers of the first ply material and inner and outer layers of the second ply material. The ply materials are arranged so the cords thereof are arranged cross-wise with respect to its neighboring ply materials or a neighboring ply material, considering the innermost or outermost layer.

A pneumatic tire may have an outboard bead portion oriented on an outboard side of the tire, an inboard bead portion oriented on an inboard side of the tire, an outboard sidewall portion oriented on the outboard side of the tire, an inboard sidewall portion oriented on the inboard side of the tire, an outboard shoulder portion oriented on the outboard side of the tire, and at least one body ply. The body ply may extend about the outboard bead portion and have a first turnup that extends to at least the outboard shoulder portion. The body ply may extend about the inboard bead portion and have a second turnup that extends to, and terminates in, the inboard bead portion or the inboard sidewall portion, wherein the first turnup height is greater than the second turnup height. At least one belt may be oriented radially outward of the body ply.

A motorcycle tire includes a tread portion between a pair of tread edges, a pair of sidewall portions, a pair of bead portions, and a carcass having a bias structure and extending between the bead portions. The tread portion, when a tread development width between the pair of tread edges is equally divided into five regions, includes a crown region, a pair of shoulder regions and a pair of middle regions located between the crown region and each of the shoulder regions. The carcass includes a plurality of carcass cords, and an angle θs with respect to a tire circumferential direction of at least one of the plurality of carcass cords in the shoulder regions is greater than an angle θc with respect to the tire circumferential direction of at least one of the plurality of carcass cords in the crown region.