REINFORCING BEAD SECTIONS OF RADIAL TYRES

摘要

Reinforcing structure at bead sections of radial tires for heavy load comprising (1) at least one carcass ply (2) at least one chafer (3) a circular triangular composite rubber stiffener composed of a lower half portion having a higher modulus and an upper half portion having a lower modulus, which is disposed between a case main portion and the turned-over carcass ply portion and (4) a reinforcing member composed of at least two rubberized organic fiber cord layers arranged at the case main portion, the inward end in the radial direction of said reinforcing member being locked with the bead base and said reinforcing member being disposed along a circular region having a given height at the case main portion.