Sumitomo Rubber Industries Limited

Ryo Oba

Kenji Ueda

Masahiro Tatsuta

Norio Hayashi

Koji Hayashi

Masaki Terashima

Tetsuya Maekawa

Masahiro Nagase

Maiko Tanabe

Ryuta Kitora

Daisuke Utsumi

Junya Tamai

Yasutaka Ishitobi

Masatomo Nakamura

Masaya Ito

Provided is a tire provided with a mark capable of reducing the air resistance during tire rotation while maintaining good visibility. A tire is provided with a mark on a tire side portion. The mark includes a first mark located on an outer side in a tire radial direction, and a second mark located inward of the first mark in the tire radial direction. Each of the first mark and the second mark includes a recess that is recessed from a side profile surface of the tire side portion. A depth of the recess of the first mark from the side profile surface is smaller than a depth of the recess of the second mark from the side profile surface.

Tire

A tyre includes a tread portion including a first middle land portion, a second middle land portion, a first shoulder land portion, and a second shoulder land portion. The first middle land portion is provided with first middle lateral grooves terminating within the first middle land portion, the second middle land portion is provided with second middle lateral grooves terminating within the second middle land portion, the first shoulder land portion is provided with first shoulder lateral grooves, and the second shoulder land portion is provided with second shoulder lateral grooves. The first middle lateral grooves and the second middle lateral grooves are inclined in a first direction with respect to the tyre axial direction, and the first shoulder lateral grooves and the second shoulder lateral grooves are inclined in a second direction opposite to the first direction with respect to the tyre axial direction.

Tyre

A tyre includes a tread portion including an outboard middle land portion disposed between an outboard tread edge and a tyre equator. The outboard middle land portion includes first and second longitudinal edges, outboard middle lateral grooves extending from the first longitudinal edge and having terminal ends within the outboard middle land portion, first outboard middle sipes extending from the respective terminal ends of the outboard middle lateral grooves to the second longitudinal edge, and second outboard middle sipes extending from the first longitudinal edge toward the second longitudinal edge beyond the terminal ends of the outboard middle lateral grooves and terminating within the outboard middle land portion. The outboard middle land portion is not provided with any lateral grooves that extend from the second longitudinal edge toward the first longitudinal edge to reach an axial center location of the outboard middle land portion.

A tire tread is provided with a crown main groove, and outboard and inboard shoulder main grooves to divide the tread portion into an outboard crown land portion, an inboard crown land portion, an outboard shoulder land portion and an inboard shoulder land portion. The inboard shoulder land portion is provided with inboard shoulder lateral grooves connecting an inboard tread edge and the inboard shoulder main groove. The outboard shoulder land portion is provided with outboard shoulder lateral grooves extending axially inwardly from an outboard tread edge and terminating within the outboard shoulder land portion. The inboard crown land portion is provided with inboard crown lateral grooves extending from the inboard shoulder main groove and terminating within the inboard crown land portion. The outboard crown land portion is provided with outboard crown lateral grooves extending from the crown main groove and terminating within the outboard crown land portion.

[Object] A pneumatic tirewhich is excellent in durability is provided. [Solution] The tireincludes adhesive sheet layers. Each adhesive sheet layerincludes an interposed portionand a protruding portion. The interposed portionis interposed between a base layerand a cap layerof a tread. The protruding portionis layered over a carcass. The adhesive sheet layersare obtained by a rubber composition being crosslinked. The rubber composition contains a tackifier. A width W1 of the interposed portionis preferably greater than or equal to 5 mm, and preferably not greater than 20 mm. A width W2 of the protruding portionis preferably greater than or equal to 10 mm, and preferably not greater than 20 mm. A thickness of each adhesive sheet layeris preferably greater than or equal to 0.5 mm, and preferably not greater than 2.0 mm. A ratio of an adhesive strength of each adhesive sheet layerto an adhesive strength of the cap layeris preferably greater than or equal to 1.30.

Pneumatic tire

To provide a pneumatic tire which is improved in on-snow performance, while maintaining steering stability on dry road surface. The pneumatic tire is provided in a tread portionwith a pair of shoulder main grooves, a center main groove, shoulder land portions, and middle land portions. The middle land portionsare provided with middle lateral groovesextending from the shoulder main groovestoward the inside in the tire axial direction, while gradually decreasing the angle with respect to tire circumferential direction. The middle lateral grooveis provided with a groove bottom sipeopened in the groove bottom.

A pneumatic tire comprises a belt layer, a band layer, and a noise dampermade of a sponge material and attached to a radially inner surface TS of a tread. The width WA of the noise damperis of from 40%-70% of a ground contacting width TW of the tread. The band layerhas an overlapping portionin which two band pliesA,B are radially overlapped; and the overlapping portioncovers an axially outer region of the belt layerwith a cover width WB of from 10%-25% the ground contacting width TW. An axially inner endof the overlapping portionis spaced a distance LC of from 5%-20% the ground contacting width TW from an axially outer end E of the noise damper

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Kobe, Japan

Ryo Oba