Patent ID: 9676235
Date: 2017-06-13
CPC Classifications: B60C

Claim:
1. A tire comprising: a tread portion which comprises a ground contact surface to contact a road surface, and an asymmetric pattern around a tire equator line; a circumferential groove which is formed in the tread portion, and extends in a tire circumferential direction; a land portion which is divided by the circumferential groove, and extends in the tire circumferential direction; and a plurality of transverse grooves which are formed in the land portion, communicate with the circumferential groove, and extend in a tread width direction, wherein the circumferential groove is located in an outer area that is an area outside of the tire equator line in a state that the tire is mounted on a vehicle, the transverse grooves comprise a first transverse groove that divides the land portion into several blocks, and a second transverse groove that divides a block divided by the first transverse groove into a first block portion and a second block portion, an area of a ground contact surface of the first block portion is configured to be larger than an area of a ground contact surface of the second block portion, the circumferential groove comprises a first area contacting the first block portion, and a second area contacting the second block portion, in a length of the circumferential groove in a tire circumferential direction, a length of the second area is configured to be larger than a length of the first area, a groove depth from a ground contact surface to a groove bottom surface of the circumferential groove varies along a tire circumferential direction, a groove depth of at least a part of the second area is smaller than the groove depth of the first area, a groove depth of at least the part of the second area is greater than 70% and 90% or less of a groove depth of the first area, and a groove width of the second area is smaller than a groove width of the first area.