| 摘要 |
PROBLEM TO BE SOLVED: To improve traveling safety of a vehicle by enhancing frictional force for icy and snowy road surfaces. SOLUTION: This tire is provided with a tread part 1, a side wall part 2, bead parts 3, bead cores 4 disposed in the bead parts 3, carcass 5 extended toroidally between a pair of bead cores 4 and a belt 6 disposed on an outer peripheral side of a crown part of the carcass 5. The tread part 1 is constituted of a first tread region 7 grounding in a maximum load capacity applying state under filling of maximum air pressure and a second tread region 8 located adjacent to a side part of the first tread region 7 and grounding by reduction of filled air pressure.
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