| 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 lug groove 4 extended from a lengthwise main groove 3 to the inside includes a bent part 4A extending with crossing the lengthwise main groove 3 at a crossing part J at an inclination angleθof 30-60 degree, and also includes a linear part 4B linearly extending along the circumferential direction of a tire. An expanded width part 6 is provided such that a ranging position K of the bent part 4A and the linear part 4B becomes a maximum groove width position Q. An inclination angleαof an outer groove wall surface 4o becomes a maximum inclination angleαmax of 15-45 degree at the maximum groove width position Q in a groove section orthogonal to a groove center line of the lug groove 4. |
