tire

Abstract

The invention provides a tire. The tire is divided into a plurality of land portions on the ground contact surface of the tread by a plurality of circumferential grooves extending along the tire circumferential direction, and each land portion is equipped with a plurality of transverse grooves crossing the land portion, wherein the transverse The grooves have an arrangement in which adjacent lateral grooves do not overlap each other in the tire circumferential direction when the lateral grooves are projected on the tire equatorial plane, and each lateral groove includes a central region and side regions, the central region extends obliquely with respect to the tread width direction, and the The side regions extend from both ends of the central region toward the peripheral groove at a smaller inclination angle with respect to the tread width direction than the central region, the side regions have a groove width that increases toward the peripheral groove, and the lateral grooves have A sipe in which the groove bottom of a transverse groove extends inward in the tire radial direction, and the sipe has a shallow bottom with a shallow depth only in the above-mentioned central region, and is shallower at least in the vicinity of the border between the central region and the side regions. The shallow bottom is arranged so that the starting point of the bottom is separated from the boundary portion.

Description

technical field [0001] The present invention relates to a tire capable of suppressing uneven wear of a tread contact surface while maintaining steering stability and water drainage on a wet road. Background technique [0002] Conventionally, for the purpose of improving wet performance, a plurality of lateral grooves and sipes that traverse the land portion are provided in the land portion defined by the peripheral grooves of the tread contact surface. Patent Document 1 discloses a tire which is expected to further suppress the tire in the sipe on the basis of maintaining the improvement of the wet performance by using the shallow groove (transverse groove) and the sipe formed at the bottom of the groove. Uneven wear occurring around the front and back causes all the shallow grooves (transverse grooves) and sipes to incline in the same direction relative to the tire axial direction. [0003] patent documents [0004] Patent Document 1: Japanese Patent Laid-Open No. 2002-10...

AI Technical Summary

Problems solved by technology

[0005] However, in a tread having such inclined lateral grooves, the rigidity of the acute-angled portion of the corner of the block formed by the lateral groove and the peripheral groove is lowered compared with the surrounding area. Uneven wear around the corners of the block, room for improvement

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