Patent ID: 6260597
Filing Date: 2001-07-17
Classification: B60C,Y10T

Abstract:
A heavy duty pneumatic radial tire comprising; a carcass of at least one rubberized cord ply of radial arrangement toroidally extending between a pair of bead cores embedded in bead portions and wound around the bead core from inside of the tire toward outside to form a turnup portion, at least one rubberized organic fiber cord layer extending outside the turnup portion over an end of the turnup portion outward in a radial direction of the tire, in which the at least one organic fiber cord layer is arranged so as to extend from a position near to an outside of the bead core over the end of the turnup portion toward the outside of the tire and spread apart from the turnup portion, and wherein the at least one organic fiber cord layer has a first bent portion acutely bending toward the outside of the tire with respect to a winding direction of the turnup portion extending outward from the position near to the outside of the bead core in the radial direction, and a bending angle (.alpha.) of the first bent portion with respect to the winding direction of the turnup portion at a radial section of the tire is within a range of 15-60.degree..