Sumitomo Rubber Industries Limited

Sho Nakajima

Ryuhei Sanae

Shotaro Abe

Koichi Nakajima

Yuto Hashimoto

Nozomi Bamba

Shiho Okabayashi

Takayuki Namera

Shogo Izakura

Ryo Miura

Kentaro Oka

Kosuke Miyoshi

A tire has a tread portion including a first shoulder land region. The first shoulder land region is provided with first shoulder sipes. Each of the first shoulder sipes is provided with a chamfered portion over an entire lengthwise range from a first longitudinal edge to a first tread edge. Each of the chamfered portions includes a first chamfered portion defined between a shoulder center position and the first longitudinal edge and a second chamfered portion defined between the shoulder center position and the first tread edge. The second chamfered portion has a chamfer volume smaller than a chamfer volume of the first chamfered portion.

Tire

A tire has a tread portion including a first shoulder land region. The first shoulder land region is provided with first shoulder sipes. Each of the first shoulder sipes is provided with a chamfered portion over an entire lengthwise range from a first longitudinal edge to a first tread edge. Each of the chamfered portions includes a first chamfered portion defined between a shoulder center position and the first longitudinal edge and a second chamfered portion defined between the shoulder center position and the first tread edge. The second chamfered portion has a chamfer volume larger than a chamfer volume of the first chamfered portion.

A tire includes a tread portion that includes a first circumferential groove and a first land portion. A groove bottom portion of the first circumferential groove includes a groove bottom reference surface and a plurality of projections projecting outwardly in a tire radial direction from the groove bottom reference surface. The first land portion has at least one first lateral groove extending from the first circumferential groove and terminating within the first land portion. In a tread plan view, an entirety of a first lateral groove extension region obtained by extending a connection portion of the first lateral groove at the first circumferential groove to the groove bottom portion of the first circumferential groove so as to be parallel to a tire axial direction is formed on the groove bottom reference surface.

A tire includes a tread portion being provided with a shoulder main groove and a crown main groove to form a middle land portion therebetween. The middle land portion is divided into a plurality of middle blocks. At least one of the middle blocks is provided with a recess to form a first portion located on a circumferential first side of the recess and a second portion located on a circumferential second side of the recess, wherein at a side of the shoulder main groove, the second portion has a circumferential edge smaller than that of the first portion. The second portion includes a ground contacting surface provided with a dimple. The dimple is located on a side of the shoulder main groove with respect to the center in the tire axial direction of the middle land portion.

A tirecomprises a tread portionprovided with an outer shoulder main groovein a part closest to an outside tread edge (To) and an outer crown main grooveon a side of an inside tread edge (Ti) of the outer shoulder main grooveboth extending continuously in the tire circumferential direction, and outer transverse groovesconnecting between the outside tread edge (To) and the outer crown main grooveso that an outer shoulder land regionA is defined between the outside tread edge (To) and the outer shoulder main grooveand an outer middle land regionB is defined between the outer shoulder main grooveand the outer crown main groove. A maximum axial width Ws of the outer shoulder land regionA is larger than a maximum axial width Wm of the outer middle land regionB.

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Kobe, Japan

Sho Nakajima