Pneumatic Radial Tire

摘要

A pneumatic radial tire includes: a pair of bead portions; a pair of side wall portions; and a tread portion in which a carcass layer is mounted between the pair of bead portions, and a belt layer that includes a plurality of monofilament steel wires laid in parallel and embedded in rubber is disposed between the pair of side wall portions on an outer circumferential side in the tread portion. The wire strand diameter of the monofilament steel wires is from 0.30 mm to 0.40 mm, each of the monofilament steel wires is twisted around their axial direction with a wire surface twisting angle of 1° to 15° with respect to the axial direction of the monofilament steel wires, and the surface residual stress of the monofilament steel wires is 0 MPa or less.

主权项

1. A pneumatic radial tire, comprising:
a pair of bead portions; a pair of side wall portions; and a tread portion in which a carcass layer is mounted between the pair of bead portions, and a belt layer that includes a plurality of monofilament steel wires laid in parallel and embedded in rubber is disposed between the pair of side wall portions on an outer circumferential side in the tread portion, the wire strand diameter of the monofilament steel wires being from 0.30 mm to 0.40 mm, each of the monofilament steel wires being twisted around an axial direction of the monofilament steel wires, with a wire surface twisting angle of 1° to 15° with respect to the axial direction of the monofilament steel wires, and a surface residual stress of the monofilament steel wires being 0 MPa or less.