Patent ID: 7172002

Claim:
A pneumatic tire comprising a tread portion, a pair of sidewall portions, a pair of bead portions, a bead core disposed in each said bead portion, a carcass comprising a ply of cords extending between the bead portions through the tread portion and sidewall portions and turned up around the bead core in each said bead portion from the axially inside to the axially outside of the tire to form a pair of turnup portions and a main portion therebetween and an inner liner made of an air-impermeable rubber extending on the tire cavity side of the carcass from one of the bead portions to the other, the radially inner end of the inner liner located radially inside the radially innermost end of the carcass, and in a radial region defined between the radially innermost end of the carcass and the radially outermost end of the bead core, the thickness of the inner liner being not less than 0.15 times but not more than 4.0 times the cross section diameter of the carcass cord, wherein each said carcass ply turnup portion is wound substantially once around the bead core to have a wound portion extending axially inwardly along the radially outer surface of the bead core, the wound portion being terminated before the carcass ply main portion, and a bead apex made of a hard rubber having a JIS-A hardness of from 70 to 100 degrees is disposed on the radially outside of said wound portion so as to secure the wound portion between the bead apex and bead core.