| 摘要 |
PURPOSE:To provide improved performance especially on an icy and snowy road, in a tire with block patterns, by forming tread parts from rubber with dynamic elastic coefficient in a particular region and forming two kinds of sipes whose intervals are different at respective blocks in the tread parts. CONSTITUTION:The tread patterns of a tire are formed from a large number of blocks 3 which are partitioned by plural main grooves 1 extending in a circumferential direction of the tire and plural sub-grooves 2 which cross the main grooves 1. Sipes 4 extending in a tire cross direction are disposed in the respective blocks 3 respectively. With this constitution, the intervals W1, W2 of the above respective sipes 4 are made to become different respectively, and either interval W1 is set within the region of 7-10mm, and the other interval W2 is set within the region of 11-15mm. Besides, the tread parts are formed from rubber with 80-110kgf/cm<2> dynamic elastic coefficient E'. It is thus possible to maintain stable friction on an icy and snowy road all the time regardless of any change in load weight. |
