The Yokohama Rubber Co., Ltd.

Takahide Ishizaka

Hiroto Kikuchi

Kouichi Kawabata

A tire includes a pair of shoulder main grooves and one or more center main grooves extending in a tire circumferential direction and four or more rows of land portions defined by the pair of shoulder main grooves and the one or more center main grooves. Each of the pair of shoulder main grooves includes a groove opening portion having a wave-like shape with an amplitude in a tire width direction. Each of the pair of shoulder main grooves includes a groove bottom portion having a zigzag shape with an amplitude in the tire width direction. The groove opening portion in each of the pair of shoulder main grooves has an amplitude A1_sh having a relationship A1_sh<A2_sh with respect to an amplitude A2_sh of the groove bottom portion.

Tire

Automobile tire

The pneumatic tireincludes a belt layerthat is formed by laminating a plurality of belt pliestoincluding the circumferential reinforcing layer. Also, the belt layerincludes at least two belt plies on the outer side in the tire radial direction of the circumferential reinforcing layer. Also, the intercord distances Tto Tk have a relationship such that T&#x2266;T&#x2266; . . . &#x2266;Tk and T&#x3c;Tk.

Pneumatic tire

A pneumatic tire includes a wide cross belt having a width not smaller than 92% and not lager than 100% of a width of a tread; and a narrow cross belt having a width smaller than that of the wide cross belt and a tire width direction outer end positioned on a tire width direction outer side with respect to a tire width direction inner edge of an outermost land portion. The tread has open sipes penetrating through the outermost land portion in the tire width direction and formed along the tire circumferential direction, and lug grooves extending along the open sipes on a contact surface of the outermost land portion and having a tire width direction outer end positioned between a tire width direction outer end of the wide cross belt and the tire width direction outer end of the narrow cross belt.

Growing community of inventors

Hiratsuka, Japan

Takahide Ishizaka