| 摘要 |
PROBLEM TO BE SOLVED: To improve driving and braking performance on icy and snowy road with preventing damages including chip and crack. SOLUTION: A siping 7 provided in a land part 6 has a first sipe part 11 extending from a first opening end 7A which opens at a wall surface K1 of the land part 6 to the inside of the land part 6, a folding part 12 which is folded from the first sipe part 11 toward the wall surface K1, and a second sipe part 13 extending from the folding part 12 to the wall surface K1 to reach a second opening end 7B which opens at a position adjacent to the first opening end 7A.
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