| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of easily discharging a stone even if the stone is caught in a closed-tip type inclined groove. <P>SOLUTION: In this pneumatic tire, a main groove 1 is provided to extend in the tire circumferential direction in a tread part T; land parts 10 are divided which extend in the tire circumferential direction in positions adjacent to the main groove 1; and the land part 10 is provided with a plurality of inclined grooves 11, opening in the main groove 1 in a basic end thereof and being closed at the tip thereof inside of the land part 10. The angle θ of inclination of the inclined grooves 11 against the tire circumferential direction is formed to be gradually reduced as it comes close to the tip, and the groove width of the inclined groove 11 is formed constant or so as to be gradually reduced as it comes close to the tip. In the tread part T, JIS hardness Hα of a rubber component in a groove end including region A1, in which the tips of the inclined grooves 11 are included, is set lower than the JIS hardness Hβ of a rubber component in a peripheral region A2 adjacent to the groove end including region A1 on both sides thereof in the tire cross direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
