Patent ID: 7152645

Claim:
A pneumatic tire comprising a carcass comprised of at least one carcass ply containing a steel cord(s) arranged at a cord angle of 70–90° with respect to an equatorial plane of the tire and toroidally extending between a pair of bead cores in a bead portion of the tire and turned up around the bead core from an inside toward an outside in a radial direction to form a turnup portion, the improvement wherein a wrap part wrapping on a peripheral face of the bead core therealong is formed in the turnup portion of the carcass ply and an outer end of the wrap part is terminated on the bead core, wherein a rubber layer controlling shearing strain is arranged between a bead filler and a bead portion reinforcing layer located at an outside of the tire, wherein said bead portion reinforcing layer extends on inner and outer sides of each of said bead cores, wherein at least one plastic deformation region is formed in the wrap part, and wherein the rubber layer has a hardness between a hardness of the bead filler and hardness of a sidewall rubber constituting a sidewall portion together with the bead filler.