| 摘要 |
PURPOSE:To provide a pneumatic radial tire preventing the generation of a crack caused by the stone biting into a fine groove even in the case of providing a shoulder rib with this fine groove extended in the tire circumferential direction. CONSTITUTION:In a pneumatic radial tire, the tread 1 has a rib-based tread pattern, and the shoulder rib 5a thereof is provided with a fine groove 6 extended in the tire circumferential direction. In this case, the depth direction middle part of the fine groove 6 is provided with a widened part 7 enlarged in the tire width direction. |
