| 摘要 |
A tire (10) having a specified rotational direction comprises: a plurality of first primary grooves (14) that are disposed in a tread (12) and are spaced apart from each other in a tire circumferential direction, each of the first primary grooves (14) having a first groove portion (16) that extends in an opposite direction from the tire rotational direction and obliquely with respect to a tire width direction from an inner end portion (14A) positioned in a tread center portion (12C), and a second groove portion (18) that extends outward in the tire width direction from the first groove portion (16) to a tread end (12E) in such that an angle formed by the second groove portion (18) with respect to the tire width direction becomes smaller than an angle formed by the first groove portion (16) with respect to the tire width direction; and first secondary grooves (20) that are disposed in the tread (12), extend in the opposite direction from the tire rotational direction from the first groove portions (16) in a normal line direction of the first groove portions (16), and terminate in the tread center portion (12C). |
