| 摘要 |
Provided is a tire such that both tire weight reduction and high durability can be achieved by establishing a technology for ensuring a sufficient effect of preventing diameter growth even when the amount of steel used in a belt layer is decreased. The tire is provided with: two or more layers of crossing belt layers (4) comprising rubberized layers of steel cords extending at an angle of 10°to 30°with respect to the tire equatorial plane, the rubberized layers being disposed with the cord directions intersecting each other; and a high-angle belt layer (3) comprising a rubberized layer of steel cords extending at an angle which is 5° or more greater than the angle of the crossing belt layers. The mass of the steel cords per unit area included in the high-angle belt layer is 85% or less of the mass per unit area of the steel cords included in the crossing belt layers, and the compressive rigidity per unit area in a cross section orthogonal to the longitudinal direction of the steel cords of the high-angle belt layer is greater than the compressive rigidity per unit area in a cross section orthogonal to the longitudinal direction of the steel cords of the crossing belt layer. |
