Patent ID: 8695657
Filing Date: 2014-04-15
Classification: B60C,Y02T

Abstract:
1. A pneumatic tire comprising: three or more circumferential direction main grooves that extend in a tire circumferential direction; a plurality of width direction grooves that extend in a tire width direction; and a plurality of lines of land portions that are sectioned by the circumferential direction main grooves and the width direction grooves, wherein the tread portion has a traction pattern formed by the circumferential direction main grooves, the width direction grooves, and the land portions, wherein when a tread center area and tread shoulder areas are sectioned at centerlines of the circumferential direction main grooves in outermost sides in the tire width direction, a ratio G=(A+B)/X of a sum A+B of a groove area A of the circumferential direction main grooves and a groove area B of the width direction grooves to a contact area X of the tread portion is in a range of G≦0.25, a ratio S=B/(A+B) of the groove area B of the width direction grooves to the sum A+B of the groove area A of the circumferential direction main grooves and the groove area B of the width direction grooves is in a range of 0.25<S<0.45, a ratio Gs=C/Y of a groove area C of the tread shoulder areas to a contact area Y of the tread shoulder areas is in a range of Gs<0.20, and the ratio G and the ratio Gs have a relation of Gs<G, and wherein a groove depth h1 of the circumferential direction main grooves and a groove depth h2 of the width direction grooves has a relation of h2/h1≧0.30, and a groove width w1 of the circumferential direction main grooves and a groove width w2 of the width direction grooves has a relation of w2/w1≧0.20.