| 摘要 |
PROBLEM TO BE SOLVED: To suppress degradation of the grounding property in forming a siping by providing the siping of a block-shaped crown part having a bent part in a middle part in the depth direction of the siping, and engaging the parts of the block-shaped crown parts divided by the siping at the bent part with each other. SOLUTION: A siping 20 of each block-shaped crown part 18 is provided with a pair of upper and lower first straight parts 22 which are extended in a substantially perpendicular direction to a surface 18A of the block-shaped crown part 18. A pair of second straight parts 24 extending in an inclined manner at the prescribed angle in the mutually separating direction toward the upstream side in the tire rotational direction from each end part opposite to a pair of first straight parts 22, and each end on the upstream side of the second straight parts 24 is connected by a third straight part 26. A tip part 28A of a first engagement part 28 demarcated by the first straight parts 22 and the second straight parts 24 is engaged with a tip part 30A of a second engagement part 30 demarcated by the third straight parts and the second straight parts 24 in the tire rotational direction. |
