Sumitomo Rubber Industries Limited

Yuto Ohte

Ryota Ikeda

Kengo Fukuda

Hiroki Uno

Teppei Nakamichi

Takashi Hagihara

Minoru Terada

Kohei Miyoshi

Hideki Osawa

Tomo Niura

Etsuro Takada

Daisuke Morito

Kenji Ueda

Takuya Osawa

Keiji Higuchi

Masaki Terashima

A tire comprises a tread portion comprising circumferential grooves and land portions divided thereby. The land portions include a first shoulder land portion and a first middle land portion adjacent thereto. The first shoulder land portion is provided with first shoulder sipes. The middle land portion is provided with first middle sipes. Each of the first shoulder sipes and the first middle sipes comprises a main portion extending in the tire radial direction, and a widened portion having a width greater than the main portion and opened at the tread surface of the land portion. The opening width of the first shoulder sipe at the tread surface is larger than the opening width of the first middle sipe at the tread surface.

Tire

Tire for automobile

Provided is a 5-rib tire that can have improved steering stability and noise performance A tread portionincludes four circumferential groovesand five land portions. Two tread ends are ends of a 50%-load ground-contact surface. Each of the five land portionsis provided with no groove having a groove width greater than 2.0 mm, and is provided with only sipes. The five land portionsinclude a shoulder land portion. The shoulder land portionis provided with a plurality of shoulder sipes. At least one of the shoulder sipesincludes an inclined portionand an axial portion. The axial portioncross the tread end.

A tread portionincludes four circumferential groovesand five land portions. Each of the five land portionsis provided with no groove having a groove width greater than 2.0 mm, and is provided with only sipes. The four circumferential groovesinclude a shoulder circumferential groove. The five land portionsinclude a shoulder land portionand a middle land portion. The middle land portionis provided with a plurality of middle sipes. The shoulder land portionis provided with a plurality of shoulder sipeseach extending from the shoulder circumferential grooveto a position beyond a tread end. At least one of the shoulder sipesincludes an inclined portion. A maximum angle of the inclined portionwith respect to a tire axial direction is not greater than a maximum angle of the middle sipewith respect to the tire axial direction. A difference between the maximum angle of the inclined portionand the maximum angle of the middle sipeis not greater than 5°.

A tread portioncan include an inner tread end, an outer tread end, circumferential grooves, and land portions. The circumferential grooves can include an inner shoulder circumferential groove and an outer shoulder circumferential groove. The land portions can include an inner shoulder land portion and an outer shoulder land portion. The inner shoulder land portion can include inner shoulder lateral grooves and inner shoulder sipes. The outer shoulder land portion can include outer shoulder lateral grooves and outer shoulder sipes. Each outer shoulder sipe can have a chamfered portion at each of sipe edges on both sides. The chamfered portion can have a chamfered width that increases from a terminating end side toward the outer shoulder circumferential groove.

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Kobe, Japan

Yuto Ohte