| 摘要 |
<p>A heavy duty pneumatic radial tire comprising a carcass (4) of at least one rubberized cord ply of radial arrangement toroidally extending between a pair of bead cores (3) embedded in bead portions (1) and wound around the bead core (3) from the inside of the tire toward the outside to form a turnup portion (4t), at least one bead portion reinforcing layer (6) made of a rubberized steel cord layer extending outside the turnup portion (4t) over an end of the turnup portion, and at least one rubberized organic fiber cord layer (5) extending outside the turnup portion over an end of the turnup portion outward in a radial direction of the tire, in which the organic fiber cord layer (5) is arranged so as to extend from a position near to an outside of the bead core (3) over the end of the turnup portion of the bead portion reinforcing layer toward the outside of the tire and spread apart to the turnup portion. <IMAGE></p> |
