| 摘要 |
PROBLEM TO BE SOLVED: To easily vulcanize and mold with ensuring excellent wet performance without causing demolding even by a die of two piece mold. SOLUTION: A tread groove G consisting of a lengthwise main groove 9 or a lug groove 10 inclined at an inclination angleθof 45 degree or less is provided to an inside region 2C of a tread surface. An outer groove wall surface 21 of the tread groove G consists of an outer groove wall surface base part 21A and a chamfered part 21B. An angle 31 at an intersection point P1 in the chamfered part 21B is 30-60 degree and larger than an angle 82 at an intersection point P2 in the outer groove wall surface base part 21A. A length L3 between the intersection points P1, P2 is set to 0.3-2.0 mm, and a recessed part 23 is formed on the outside of the axial direction of the tire along the tread groove G at an interval L4 of 0.5-2.0 mm from the intersection point P1. |
