Patent ID: 9452642
Filing Date: 2016-09-27
CPC Classification: B60C

Claim Text:
1. A pneumatic tire comprising a tread portion having a pair of tread edges, the tread portion being provided with a pair of circumferentially and continuously extending shoulder main grooves adjacent to each tread edge and a pair of circumferentially and continuously extending center main grooves disposed axially inwardly of the shoulder main grooves to define a pair of middle portions each of which is between the adjacent shoulder main groove and center main groove, the shoulder main grooves having groove widths, the center main grooves having groove widths larger than the groove widths of the shoulder main grooves, and the respective middle portions being provided with a plurality of inner middle lug grooves extending axially outwardly of the tire from the center main groove, and a plurality of outer middle lug grooves extending axially inwardly of the tire from the shoulder main groove, the total number of inner middle lug grooves being smaller than the total number of outer middle lug grooves, in each middle portion, wherein each of the shoulder main grooves and the center main grooves comprises a plurality of axially inner parts and a plurality of axially outer parts disposed axially inwardly of the axially outer parts, wherein the axially outer parts and the axially inner parts are alternately arranged in a circumferential direction of the tire, wherein each of the shoulder main grooves and center main grooves has an axially inner groove edge and an axially outer groove edge, and wherein a first axial gap between the axially inner part and the axially outer part on the axially inner groove edge is smaller than a second axial gap between the axially inner part and the axially outer part on the axially outer groove edge.