Heavy duty pneumatic radial tires with organic fiber cord bead reinforcing layer

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 bead portion reinforcing layer made of a rubberized steel cord layer extending outside the turnup portion over an end of the turnup portion, and 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 at least one bead portion reinforcing layer toward the outside of the tire and spread apart from the at least one bead portion reinforcing layer, 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 the at least one bead portion reinforcing layer extending outward from the position near to the outside of the bead core in the radial direction and the extending direction of the at least one bead portion reinforcing layer, and a bending angle (α) of the first bent portion with respect to the extending direction of the at least one bead portion reinforcing layer at a radial section of the tire is within a range of 15-60°.