| 摘要 |
PROBLEM TO BE SOLVED: To enhance anti-wandering performance and uneven wear-resistance performance in a sufficiently balanced manner. SOLUTION: A circumferential thin groove 10 extending continuously in a circumferential direction is provided on a buttress surface 3Sa of a sidewall 3 continued to a tread end edge Te of a tread surface 2S through a circular arc part 9 of a shoulder. The circumferential thin groove 10 comprises: a thin groove body 12 extending from an opening part 11 to an inner side in a tire axial direction; and a sub-part 13 having a projection portion 14 exceeding a groove side surface 12a at an outer side in a radial direction of the thin groove body 12 and projected to an outer side in a radial direction. An outer end point P in a radial direction of the projection portion 14 is positioned at an outer side in a radial direction than an opening edge 11a at an outer side in a radial direction of the opening part 11. A radius Rs of curvature of the circular arc part 9 of the shoulder is 8 mm or longer. COPYRIGHT: (C)2010,JPO&INPIT |
