Patent ID: 8528614

Claim:
A pneumatic tire comprising: a pair of bead portions; a bead core provided at each bead portion and having a polygonal configuration in cross section; a radial carcass extending in a toroidal shape from one bead portion to the other bead portion such that respective ends thereof are wound around the corresponding bead cores from the inner side to the outer side of the tire; at least one layer of wire chafer disposed on the outer side of the radial carcass with respect to the bead core; and a rubber chafer disposed in a contact area between the bead portion and a prescribed rim, wherein, in a cross section of the tire assembled with the prescribed rim, the angle formed by the bottom side of the bead core with respect to a bead seat of the prescribed rim is set in the range of 0±2°, and a portion, on the tire outer surface side, of a spiral filament of steel cords constituting the wire chafer extends at an angle in the range of 90±5° with respect to the extending direction of ply cords constituting the radial carcass, such that the spiral filament extends to substantially intersect the ply cords of the radial carcass.