Patent ID: 7562685

Claim:
A run-flat tire comprising: a pair of bead sections each having an annular first bead; side wall sections respectively extending to a tire outer peripheral side from the bead sections; a reinforcing rubber layer arranged in said side wall section so as to be formed in a crescent cross sectional shape; an annular protrusion section protruding to an outer side in a tire width direction from at least one of said bead sections, and having an inner peripheral side surface facing to an outer peripheral side curved surface of a rim flange at a time of installing a specified rim; and an annular second bead arranged in said annular protrusion section, wherein the run-flat tire comprises: a ridge section connecting to an outer side in the tire width direction from an inner peripheral side surface of said annular protrusion section so as to protrude to an inner peripheral side of the tire, and having an inner diameter smaller than an outer diameter of said rim flange; and a first soft rubber layer arranged in the ridge section and having a corner section tapered toward the tire inner peripheral side and made of softer material than the ridge section.