Patent ID: 7152647

Claim:
A pneumatic tire comprising a tread portion with tread edges, a pair of sidewall portions, a pair of bead portions each with a bead core therein, and a carcass ply of cords comprising a main portion extending between the bead cores through the tread portion and sidewall portions and a wound portion wound around the bead core in each said bead portion from the inside to the outside of the tire, and an edge of the wound portion disposed between the bead core and a bead apex rubber disposed radially outside the bead core to be secured therebetween, wherein in a meridian section of the tire mounted on a standard wheel rim and inflated to 5% of a standard pressure, a straight line (K), which is drawn between: an intersecting point (Pa) of a radial line (X) extending radially outwardly from the centroid of the bead core with the carcass main portion; and an intersecting point (Pb) of a straight line (Y) extending axially inwards from the centroid of the bead core in parallel to the radially inner surface (SL) of the bead core with the carcass ply, has an inclination angle (theta) of from 50 to 60 degrees with respect to the straight line (Y).