Patent ID: 9630453
Date: 2017-04-25
CPC Classifications: B60C

Claim:
1. A pneumatic tire used with a specified rotation direction, comprising: a tread; a pair of sidewalls extending continuously from the tread inward in a tire radial direction; a pair of beads continuous with the sidewalls inward in the tire radial direction; and at least one ridge on a buttress surface, the buttress surface extending from a tread edge of a tread surface formed on the tread to the sidewall, and the ridge extending from a sidewall side of the buttress surface towards the tread edge and terminating before reaching the tread edge; and at least one concavity on the buttress surface in a region adjacent to the tread edge, the concavity opening to the tread surface, being recessed from the buttress surface, and being independent from the ridge; and a land portion, wherein the ridge includes a steeply inclined surface, having a high gradient with respect to the buttress surface, inclined forwards in the rotation direction, and a moderately inclined surface, having a more moderate gradient than the steeply inclined surface, inclined backwards in the rotation direction, and the at least one concavity comprises a plurality of concavities separated from each other and adjacent in a tread circumferential direction, and in a region towards the tread edge from the ridge, the land portion located between the concavities adjacent in the tread circumferential direction is connected in the tread circumferential direction via a portion of the buttress surface.