| 摘要 |
PROBLEM TO BE SOLVED: To provide a studless tire capable of improving braking performance and driving performance on ice in a new tire. SOLUTION: A block 4 is formed of a plurality of main grooves extending in the tire peripheral direction and a plurality of auxiliary grooves intersecting with the main prooves 2, and a plurality of sipes 5 of more than 5 mm deep are provided in the tire cross direction of this block 4 on this studless tire. In this case, auxiliary sipes 6 of less than 1 mm deep are provided at least between the sipes 5, 5, and a ratio d2 /d1 of sipe density d1 expressed in length existing per a unit area of the sipes 5 and auxiliary sipe density d2 expressed in length existing per a unit area of the auxiliary sipes 6 is made 0.3-2.5. |
