To obtain a pneumatic tire using a silica-mixed sidewall rubber composition having cut resistance/fatigue resistance and reduction in fuel cost balanced in a high order while keeping processability.
The pneumatic tire is obtained by using a rubber composition as a sidewall produced by mixing (A) 100 parts wt. of rubber composed of 20-60 pts.wt. of natural rubber and/or polyisoprene rubber and 40-80 pts.wt. of the total of butadiene rubber prepared by preblending 5-40 wt.% of low-molecular-weight butadiene rubber having 6,000-60,000 number-average molecular weight with 60-95 wt.% of high-molecular-weight butadiene rubber having ≥500,000 number-average molecular weight with (B) 30-60 pts.wt. of the total of 10-40 pts.wt. of silica and carbon black, (C) a sulfenamide-based vulcanization accelerator and (D) 1.3-1.8 pts.wt. of sulfur in the blending ratio of the vulcanization accelerator/sulfur of 0.5-0.7.
Takashi Ishida
Tetsuji Koga
Koji Takeuchi
Masaya Nishiyama