The Yokohama Rubber Co., Ltd.

Tadanobu Nagumo

Izumi Kuramochi

Sadakazu Takei

Akinori Tokieda

Yukio Tozawa

Riichiro Mama

Kenhachi Mitsuhashi

Masaru Hirai

Masatoshi Kozima

Tadayoshi Hiraga

Tadashi Harashima

Kojiro Ishikawa

Kiyoshi Toyohara

Takuji Nishi

A pneumatic radial tire arrangement for a vehicle wherein each tire has a belt structure formed of two belt layers respectively made of steel cords and aromatic polyamide fiber cords and which have their edge portions folded back. Each tire is mounted to the vehicle with the folded back portion of the steel cord belt layer located towards the outer side of the vehicle to reduce steering pull during high speed performance of the vehicle.

Pneumatic radial tire arrangement for vehicle

A tread pattern in which the width and positions of grooves formed annularly in the portion of the surface of the tread which corresponds to the ground-contacting surface of the tire, in such a manner that the grooves extend in the circumferential direction of the tire, are suitably limited.

Tread pattern

Automobile tire

A pneutmatic radial-ply tire in which the rubber portion of at least one of a carcass ply and an undertread constituting the tire is made of a rubber which has a viscoelastic property of loss tangent, tan.delta., of 0.2 or lower (tan.delta..ltoreq.0.2) and storage modulus, G, of 120 Kg/cm.sup.2 or higher (G.gtoreq.120 kg/cm.sup.2), so that the rolling resistance of the tire is reduced without being accompanied by degradation of braking performance, control stability, comfortableness and wear resistance of the tire.

Radial-ply tire having low rolling resistance

A pneumatic tire provided with a plurality of slots which are provided in tread grooves and extend in the transverse direction of the grooves but at a suitable spacing from each other for the purpose of confining between the slots the growth of cracks produced in the grooves, so that each crack is prevented from growing up to an extent exceeding the spacing between the slots.

Crack prevention for pneumatic tire

Growing community of inventors

Hiratsuka, Japan

Tadanobu Nagumo