Sumitomo Rubber Industries Limited

Masataka Hiro

Hiroshi Ito

Takayuki Nagase

Takuya Horiguchi

Shuichiro Ono

Takahiro Kawachi

Subaru Toya

Masako Nakatani

Fumiya Kato

Tetsuya Maekawa

Natsuki Maekawa

Ayuko Yamada

Satomi Yamauchi

Yuki Kasai

Noriyuki Nishi

A pneumatic tirecomprises a carcassextending between bead cores of bead portions via a tread portionand sidewall portions, and a belt layerarranged on an outer side in a tire radial direction of the carcassand inside of the tread portion. The pneumatic tirefurther comprises a damping rubber bodyarranged between the carcassand the belt layer, and a noise damperarranged on an inner cavity surface of the tread portion. A width Win a tire axial direction of the damping rubber bodyis in a range of from 60% to 130% of a width Win the tire axial direction of the belt layer, and a water absorption rate of the noise damperis in a range of from 10% to 25%.

Pneumatic tire

The present invention provides: a rubber composition for a tire that achieves both good fuel economy and abrasion resistance, and also achieves good degradation resistance and processability; and a heavy-load tire having a tread produced therefrom. The present invention relates to a rubber composition for a tire, comprising a rubber component that contains a modified natural rubber having a phosphorus content of 200 ppm or less and a butadiene rubber, wherein the amount of the modified natural rubber is 60 to 95% by mass and the amount of the butadiene rubber is 5 to 40% by mass, based on 100% by mass of the rubber component.

Tire rubber composition and heavy-load tire

Growing community of inventors

Kobe, Japan

Masataka Hiro