Patent ID: 9016337
Filing Date: 2015-04-28
Classification: B60C

Abstract:
1. A pneumatic tire comprising: a main groove extending along a tire circumferential direction in a tread, wherein a side wall of a land portion facing the main groove extends so as to be inclined with respect to a tire circumferential direction between a pair of corner portions, and of the pair of corner portions, the corner portion positioned in an inner side in a width direction of the main groove is set to an inner corner portion and the corner portion positioned in an outer side in the width direction of the main groove is set to an outer corner portion, and in the inner corner portion, the side wall is formed by a stepped surface having an expansion toward the outer side at each step in the width direction of the main groove and extending toward a groove bottom, and an amount of widening (WL) of an expansion to the outer side in the width direction in the stepped surface becomes progressively smaller in a direction from the inner corner portion toward the outer corner portion, and wherein the stepped surface is constructed by a plurality of inclined surfaces which are inclined to the inner side in the width direction of the main groove toward the groove bottom, and there is a coupling surface coupling the inclined surfaces to each other.