Sumitomo Rubber Industries Limited

Ryotaro Kitahara

Hiroshi Yamaoka

Takeru Iwashita

A tire comprises a tread portion comprising a circumferentially arranged blocks divided by lateral grooves. Each block has a block side wall and a block tread. Each lateral groove comprises an axially outer first portion, an axially inner second portion, and a connect portion at which the first portion and the second portion are connected with each other so that each block is provided with a convex corner portion which is convex toward the outside of the block at the connect portion. In the convex corner portion, the block side wall comprises a first side wall extending along the first portion, a second side wall extending along the second portion, and a substantially triangular third side wall intersecting the first side wall, the second side wall and the block tread. The third side wall terminates radially outside the groove bottom of the lateral groove.

Tire

A tire includes a tread portion including a first land portion, the first land portion being provided with a plurality of first sipes. The plurality of first sipes extends in an arc shape manner. The plurality of first sipes is arranged on the first land portion without communicating with lateral grooves extending in a tire axial direction. In a tread plan view, a virtual sipe reference line of each of the plurality of first sipes has an angle equal to or less than 10 degrees with respect to a tire circumferential direction, wherein the virtual sipe reference line is a straight line that connects both ends of each of the plurality of first sipes.

Growing community of inventors

Kobe, Japan

Ryotaro Kitahara