Patent ID: 8596318
Filing Date: 2013-12-03
Classification: B60C

Abstract:
1. A pneumatic tire having a tread surface in which two circumferential direction main grooves continuous in a tire circumferential direction are arranged on each of left and right sides of a tire center, and land portions are defined by the circumferential direction main grooves as ribs or blocks having lug grooves, wherein a plurality of fine grooves are provided only in each of right and left walls of each of the circumferential direction main grooves, the fine grooves being inclined in a radial direction to the tire circumferential direction at an angle of 20° to 70°, the fine grooves being provided in regions along the circumferential direction main groove, covering at least 50% of the entire circumference thereof in total, in each of the two circumferential direction main grooves on tire shoulder sides, the fine grooves in the right wall and the fine grooves in the left wall are inclined to the tire circumferential direction in the same direction in a plan view in a tire radial direction, and in each of the two circumferential direction main grooves on a tire center side, the fine grooves in the right wall and the fine grooves in the left wall are inclined to the tire circumferential direction in directions opposite to each other in a plan view in the tire radial direction, wherein the fine grooves extend from the tread surface toward the bottom of the circumferential direction main grooves; groove walls of each circumferential direction main groove are inclined to a normal direction of the tread surface at an angle of 7° to 13°, and wherein each of said circumferential direction main grooves has a see through structure.