Patent ID: 8376008
Filing Date: 2013-02-19
Classification: B60C,C08K,Y10T

Abstract:
1. A run-flat tire comprising a sidewall-reinforcing layer, wherein said sidewall-reinforcing layer is prepared by using a rubber composition comprising non-metallic short fibers having an average fiber diameter of 1 to 100 μm and an average fiber length of 0.1 to 20 mm in an amount of 5 to 120 parts by weight on the basis of 100 parts by weight of a diene rubber, the non-metallic short fibers being oriented in the circumferential direction of the tire and the thickness of the sidewall-reinforcing layer being not less than 3 mm and not more than 15 mm, wherein said sidewall-reinforcing layer satisfies the following equation: wherein E wherein the sidewall-reinforcing layer is a crescent-shaped rubber layer which contacts with the inside of a carcass ply, is adjacent to a bead apex and is arranged from a bead part to a shoulder part, in which a thickness of the rubber layer decreases gradually toward both ends, and a radially inner end of the crescent-shaped rubber layer extends radially inward of an upper surface of a bead core.