[Object] A pneumatic tire that allows reduction of the occurrence of a TGC and, at the same time, allows reduction of rolling resistance, is provided. [Solution] The tire 12 includes a band 26 disposed radially inward of a tread 14, and a belt 24 disposed radially inward of the band 26. The band 26 includes a cord that is helically wound and extends substantially in a circumferential direction. The belt 24 includes an inner layer 24a, and an outer layer 24b that is layered over the inner layer 24a and disposed radially outward of the inner layer 24a. The inner layer 24a and the outer layer 24b each include multiple cords aligned with each other. The cords in the inner layer 24a and the cords in the outer layer 24b are inclined relative to an equator plane. A direction in which the cords in the inner layer 24a are inclined relative to the equator plane is opposite to a direction in which the cords in the outer layer 24b are inclined relative to the equator plane. Absolute values of inclination angles of the cords in the inner layer 24a and the cords in the outer layer 24b relative to the equator plane are greater than or equal to 35, and not greater than 55.

A pneumatic tire comprises a tread portion provided with a band layer disposed radially inside a tread rubber provided with a first circumferential groove. Cords of the band layer are a hybrid cord formed by twisting together a first filament and a second filament having an elastic modulus lower than that of the first filament. In a region radially inside the first circumferential groove, a maximum thickness t1 of topping rubber on the radially outer side of the band cords is not more than 1.0 mm; a minimum distance d1 from the bottom of the first circumferential groove to the radially outer surface of the band layer is not more than 2.0 mm; and a distance d2 from a groove edge of the first circumferential groove to the radially outer surface of the band layer is not more than 15.0 mm.

A tire having four belt plies laminated at an outside circumference of the carcass. Cords at second and third belt plies among the four belt plies, as numbered from the carcass to the outside circumference, intersect, being inclined in mutually opposite fashion with respect to a tire axis. Angles of inclination with respect to the tire circumferential direction of the second and third belt plies are such that an angle at a belt end is less than an angle at a tire equator. A first mounded region that has a peak at which the angle of inclination is greater than at a periphery and that corresponds to a shoulder rib which among the plurality of ribs is provided. The peak at the first mounded region is arranged at a shoulder rib region which appears to overlap the shoulder rib as seen in plan view.

To increase a restraining force to a belt layer and to improve the durability of the tire. A band layer of a spirally wound band-like ply includes: a first ply portion extending from a starting end located between the tire equator and one end in the tire axial direction of a belt layer to the one end in the tire axial direction of the belt layer; a second ply portion extending from the one end in the tire axial direction of the first ply portion to the other end in the tire axial direction of the belt layer; and a third ply portion extending from the other end in the tire axial direction of the second ply portion to a terminal end located between the tire equator and the other end in the tire axial direction of the second ply portion. The band-like ply is continuous from the starting end to the terminal end without interruption.

The present invention provides a pneumatic tire by which workability when molding a tire and tire durability performance can be enhanced without increasing tire weight when providing a reinforcing layer formed by aligning a plurality of monofilament steel wires and embedding this plurality of monofilament steel wires in rubber. The pneumatic tire of the present invention includes a reinforcing layer formed by aligning a plurality of monofilament steel wires and embedding said monofilament steel wires in rubber. Each of the monofilament steel wires is provided with twisting around an axis thereof, and a wire surface twisting angle with respect to an axial direction of the monofilament steel wires is not less than 1.

The invention is directed to a pneumatic vehicle tire having a carcass and a belt built up on the radial outside of the carcass. The tire includes a profiled tread which is built up on the belt on the radial outside of the belt. The belt is formed from at least four belt plies which are arranged one on top of the other from the radial inside to the radial outside. The first belt ply and the second belt ply are crossing working plies. The reinforcing elements of the first and second belt plies are arranged at an angle of 10 to 45 to the circumferential direction. The reinforcing elements of the fourth belt ply are arranged at an angle of 40 to 75 to the circumferential direction and the reinforcing elements of the third belt ply are arranged at an angle of 0 to 5 to the circumferential direction.

Disclosed are a tire fiber having high adhesion to other members, a rubber/fiber composite having improved adhesion between rubber and fiber, and a tire having high hydraulic durability. The tire fiber comprises a polyethylene-2,5-furandicarboxylate (PEF) raw yarn, wherein the PEF raw yarn comprises as a raw material PEF having a terminal carboxylic acid amount of 1 to 100 mmol/kg.

A method for manufacturing a straight steel monofilament for the reinforcement of belt ply of a pneumatic tyre, where the arc-height of the straight steel monofilament is less than 30 mm. The steel monofilament is plastically deformed by a twisting along the axis of the steel monofilament on a double-twist apparatus. The plastic twist deformation eliminates the surface stress difference on the steel monofilament and provides a straight steel monofilament for belt ply reinforcement. This provides a simple solution with existing apparatus to manufacture straight steel monofilament suitable for tire reinforcement with high speed for mass production.

Provided is a pneumatic tire with an annular-shaped tread portion extending in a tire circumferential direction, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed inward of these sidewall portions in a tire radial direction. This pneumatic tire is also provided with a reinforcing member which includes a plurality of reinforcing cords oriented in at least three directions, and has a mesh-like structure with at least three of the reinforcing cords oriented in different directions joined together at at least a portion of intersecting locations of the reinforcing cords.

A method for retreading a wheel tire casing: a wheel tire casing is induction heated so as to soften a thermally malleable layer located between a tread of the casing and a carcass of the casing, the tread is removed from the carcass, and another tread is applied to the carcass.