To provide a tire that effectively control eccentric wear of a block part provided on a tread face.
A tire includes land part rows formed with a first main groove and a second main groove extending in a tire circumferential direction, and a plurality of lateral grooves extending in a tire width direction are formed in land lanes. In the land lane, a first lateral groove whose one end opens in a first main groove and the other end terminates inside the land lane, and a second lateral groove whose one end opens in the second main groove and the other end terminates inside the land lane are formed as a plurality of lateral grooves, and a communication groove to communicate with the first lateral groove and the second lateral groove is formed, and thereby a plurality of block parts are formed. In each of the plurality of block parts, a main groove sidewall angle formed by the main groove sidewall surface and a tread face changes to become an acute angle at one end of the tire circumferential direction, and to become a blunt angle at the other end of the tire circumferential direction. The lateral groove sidewall angle that is formed by the lateral side groove that is formed by the lateral groove sidewall surface formed in one side of the tire circumferential direction and the tread face changes from the acute angle to the blunt angle as it approaches to the main groove sidewall surface.
| JP2008174198A | 2008-07-31 | |||
| JP2011240889A | 2011-12-01 |
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu