| 摘要 |
A pneumatic radial tire with a sum of tire maximum width W and tire maximum diameter D defined in a range from 750 mm to 1250 mm has a belt layer disposed radially outside a carcass. On the tire meridian section, a tread surface is curved along a single arc with a curvature radius TR1 having a center on the tire's equatorial plane, and a radially outer surface of the belt layer is curved along a single arc with a curvature radius BR1 having a center on the tire's equatorial plane. The curvature radius TR1 is larger than the curvature radius BR1, and a product of the curvature radius TR1 and the curvature radius BR1, that is, (TR1xBR1) is in a range from 33.7x104 mm2 to 45.0x104 mm2.
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