| 摘要 |
<p>A heavy duty pneumatic radial tire (11) comprises a radial carcass (12), a belt (16) and a tread (18), wherein the belt (16) is comprised of four or more belt layers (20), cords of two adjacent belt layers among these layers being crossed with each other with respect to an equatorial plane (S) of the tire. In this tire, when a main cross belt (21) is constituted with a widest-width belt layer (20b) and a wider-width belt layer (20c) among two belt layers (20a,20c) adjacent to the widest-width belt layer (20b), an inclination angle of cords in a neighbouring narrower-width belt layer (20d) arranged at an outside of the main cross belt (21) in the radial direction and adjacent thereto with respect to the equatorial plane of the tire is made larger than an inclination angle of cords in a belt layer arranged outward in the radial direction among the widest-width and wider-width belt layers (20b;20c). <IMAGE></p> |
