Patent ID: 7650921
Filing Date: 2010-01-26
Classification: B60C,Y10T

Abstract:
1. A run-flat tire comprising: a carcass including at least one carcass ply having a ply body extending from a tread portion to a bead core of a bead portion through a sidewall portion, and a ply folded-back portion which is connected to the ply body and which is folded back from inside toward outside around the bead core in an axial direction of the tire; a belt layer disposed outside of the carcass in a radial direction of the tire and inside of the tread portion; a side reinforcing rubber layer which is disposed axially inward of the carcass ply body in the sidewall portion and which has a substantially falcate cross section; a side reinforcing cord layer comprising two reinforcing cord plies overlapping each other and disposed in the sidewall portion, in which reinforcing cords are arranged at an angle of 35° to 70° with respect to the radial direction so that the reinforcing cords in one ply intersect with reinforcing cords in the other ply, and a bead apex rubber which is tapered and toward radially outward from an outer surface of the bead core and is disposed in the bead portion between the carcass ply body and the carcass ply folded-back portion, wherein the side reinforcing cord layer extends in the radial direction in contact with the axially outer surface of the ply body, and passes between the ply body and the bead apex rubber, an outer end of the side reinforcing cord layer in the radial direction is sandwiched and terminated between the ply body and the belt layer, and an inner end of the side reinforcing cord layer in the radial direction is terminated in the vicinity of the bead core.