Patent ID: 8636043
Filing Date: 2014-01-28
Classification: B60C

Abstract:
1. A pneumatic tire comprising: a center circumferential groove provided on an equator of a tread; shoulder circumferential grooves provided at both sides in a tire lateral direction of the center circumferential groove of the tread and at tire lateral direction outermost sides; first lateral grooves that are provided in the tread, extend away from the equator toward the shoulder circumferential grooves, and are inclined at θ second lateral grooves that are provided in the tread, extend away from the equator toward the shoulder circumferential grooves, and are set to an inclination angle relative to the tire axial direction of θ wherein the first lateral grooves and the second lateral grooves merge at the shoulder circumferential grooves, and shoulder lateral grooves are provided in the tread, at an inclination angle relative to the tire axial direction of θ wherein, at a tread surface, lateral sipes extending in the tread lateral direction are formed in a plurality of blocks that are formed by the plurality of grooves extending in the tire circumferential direction and the tire lateral direction, of the plurality of blocks, center blocks which are disposed at the equator side are smaller than shoulder blocks which are provided at the lateral direction outer sides relative to the center blocks, at least a portion of the grooves that form the center blocks is formed with a raised floor face that is at a depth shallower than a depth from the tread surface to floor faces of the grooves that form the shoulder blocks, of an adjoining plurality of the center blocks, at least one block is a triangular block that is formed with a triangular shape in a plan view of the tread, and at least one of the grooves that form the triangular block is inclined upward toward a tapered obtuse angle corner portion at the floor face thereof and is formed with an inclined narrow groove that is narrower than the groove.