| 摘要 |
PROBLEM TO BE SOLVED: To tremendously improve on-ice performance, by optimizing a tread patten.SOLUTION: The pneumatic tire has a block group Gformed by mutually densely aggregating a plurality of independent blocks 3 partitioned by a groove 2, in at least a part of a tread part 1, and is formed so that when assuming the reference pitch length of the blocks in the block group Gas P(mm), a width of the block group Gas W(mm), the number of blocks 3 present in a reference area Z of the block group Gpartitioned by the reference pitch length P and the width W as a (pieces) and the negative ratio in the reference area Z as N(%), block number density S per unit actual grounding area of the block group Gimparted by S=a/{P×W×(1-N/100)}, is set within a range of 0.003 piece/mmor more and 0.04 piece/mmor less. |
