| 摘要 |
A sipe formed in a block of a tread surface is provided with a first sipe portion having a first wide portion, a second sipe portion having a second wide portion in a different side from the first wide portion in a sipe width direction and positioned close to a sipe bottom portion side of the first sipe portion so as to become wider than the first sipe portion, and a third sipe portion having a third wide portion in the same side as the first wide portion in the sipe width direction and positioned close to a sipe bottom portion side of the second sipe portion so as to become wider than the second sipe portion.
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