| 摘要 |
Provided is a pneumatic tire being improved in heat dissipation effect in the tread portion while being ensured in rigidity of the land portion. A narrow groove (9) is formed on a tread surface (1), the narrow groove extending in a direction inclined relative to the tire circumferential direction and having a groove width (W1) and a groove depth (D1), the groove width (W1) being smaller than the groove depth (D1). The narrow groove (9) opens at both ends thereof to the outside of the land portion. An air inflow part (10) is formed on at least one of the groove walls (9c) of the narrow groove (9), the groove walls facing each other in the tire circumferential direction, where the narrow groove (9) has a maximum depth (D1) and the air inflow part (10) has a maximum depth (D2), the D1 and the D2 satisfying 5<D1/D2≦15. |
| 主权项 |
1. A pneumatic tire comprising
a narrow groove formed on a tread surface, the narrow groove extending in a direction inclined with respect to the tire circumferential direction and having a groove width smaller than a groove depth, the narrow groove opening at both ends thereof to the outside of the land portion, the narrow groove having an air inflow part formed on at least one of the groove walls facing each other in the tire circumferential direction, the air inflow part opening to the tread, wherein the narrow groove has a maximum depth D1 and the air inflow part has a maximum depth D2, the D1 and the D2 satisfying:
5<D1/D2≦15. |
