| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of equalizing the rigidity in the tire circumferential direction without dropping the degree of freedom in designing the cross-sectional shape of lug grooves even in a construction in which the groove width of the lug grooves in the tire circumferential direction differs according to the length of blocks in the tire circumferential direction. SOLUTION: Chamfers 7a, 7b, 7c are arranged in corners of blocks 7 with a large pitch A, medium pitch B and small pitch C respectively among blocks 7 facing the lug grooves 6 crossing vertical grooves 5, and formed so that the chamfer volume in the block 7 facing the lug groove 6 with small groove width in the tire circumferential direction becomes larger than the chamfer volume in the block 7 facing the lug groove 6 with large groove width in the tire circumferential direction, thereby, deviation of the volume of the rubber pushed in during vulcanization molding becomes small. In this case, because the volume of the rubber pushed in is equalized due to the difference in the chamfer volume of the chamfers 7a, 7b, 7c, the degree of freedom in designing the cross-sectional shape of the lug grooves 6 is not dropped. COPYRIGHT: (C)2010,JPO&INPIT |
