Patent ID: 8397775

Claim:
A pneumatic tire which comprises: a tread portion, a pair of side wall portions, a carcass extending through the tread portion and into said side wall portions, a belt layer extending through the tread and disposed on the outer side of the carcass, and a cushion having a substantially triangular section disposed between the carcass and end portions of the belt layer at both sides of the tread portion and in the axial direction of the tire, said cushion consists essentially of, 5 to 20 parts by mass of a first carbon black having an iodine adsorption number of 50 to 70 mg/g and a dibutyl phthalate oil absorption of 130 to 150 ml/100 g and 15 to 30 parts by mass of a second carbon black having an iodine adsorption number of 110 to 130 mg/g and a dibutyl phthalate oil absorption of 105 to 120 ml/100 g, as well as sulfur and a vulcanization accelerator, with respect to 100 parts by mass of a rubber component, wherein the mass ratio of sulfur to said vulcanization accelerator is 1.0 to 2.3.