Patent ID: 7431062
Filing Date: 2008-10-07
Classification: B60C

Abstract:
1. A pneumatic radial tire having a thin groove continuous in a tire circumferential direction at a buttress formed between a shoulder of a tread and a sidewall, comprising: a tire contour portion that is formed between an end portion of the shoulder and a groove floor of the thin groove, wherein a tire transverse direction outermost portion at a shoulder side curved portion is disposed farther toward a tire radial direction inner side than a sidewall side end portion of a sidewall side groove wall surface of the thin groove, wherein the tire contour portion includes an inclined portion from the end portion of the shoulder toward the thin groove and a shoulder side wall surface of the thin groove, wherein the tire transverse direction outermost portion is an intersection of the inclined portion and the shoulder side groove wall surface at the shoulder side curved portion, wherein the end portion of the shoulder is closer to a width center of the tire in a width direction than the entire thin groove, wherein said sidewall side end portion of the sidewall side groove wall surface of the thin groove is radially inside said end portion of said shoulder, and axially outside the tire transverse direction outermost portion at the shoulder side curved portion, and further wherein said sidewall side end portion of the sidewall side groove wall surface of the thin groove contacts said inclined portion when the buttress is deformed by a lateral force.