Sumitomo Rubber Industries Limited

Eisuke Hirosue

Hiroshi Kikuchi

Tomohisa Kuriyama

Keisuke Hashimoto

A tire having a tread portion. The tread portion includes a first shoulder land portion that is defined between a first shoulder main groove and a first tread end. The first shoulder land portion includes: a shoulder lateral groove that extends from the first tread end and ends in the first shoulder land portion; a first sipe that extends from an end of the shoulder lateral groove to the first shoulder main groove; and a second sipe that extends from the first tread end toward the first shoulder main groove, and ends in the first shoulder land portion. A length of the shoulder lateral groove in a tire axial direction is 0.10 to 0.30 times a width of the first shoulder land portion in the tire axial direction.

Tire

A tire includes a tread portion including at least one land portion having axially spaced first and second ends. The at least one land portion is provided with lateral grooves extending from the first end to terminal ends terminating within the at least one land portion, first sipes each extending along a tire circumferential direction to connect a pair of lateral grooves arranged adjacently in the tire circumferential direction, second sipes extending from the first end toward the first sipes, and third sipes extending from the second end toward the first sipes. The second sipes and the third sipes are arranged without intersecting the lateral grooves.

In an apexof a tire, a reinforcing portionis located inward of a main bodyin an axial direction. When a position on an outer surface of the tireat which position a height from a BBL is 14 mm is defined as a first point Pand a position on the outer surface of the tireat which position a height from the BBL is 20 mm is defined as a second point P, the reinforcing portionoverlaps the first point Pand the second point Pin a radial direction. A loss tangent of the reinforcing portionis equal to a loss tangent of the main bodyor less than the loss tangent. A hardness of the reinforcing portionis equal to a hardness of the main bodyor greater than the hardness.

Growing community of inventors

Kobe, Japan

Eisuke Hirosue