| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire free to be compatible with uneven abrasion performance after abrasion and wet performance from the time of a new product. SOLUTION: It is also possible to restrain generation of heel and toe abrasion without becoming a generating source of pattern noise as a narrow gradually inclined groove 40 is closed at the time of grounding at the time of the new article. A wide gradually inclined groove 42 is furnished with a V letter shaped part, and so, movement in the neighbourhood of an edge of a land part 44 is restrained, and generation of the heel and toe abrasion is restrained. At the time of 50% abrasion, groove width of the narrow gradually inclined groove 40 becomes small and draining property is lowered, but as groove width of the narrow gradually inclined groove 40 becomes large, lowering of the draining property is compensated. Additionally, at the time of 50% abrasion, it is possible to restrain generation of the heel and toe abrasion caused by the wide gradually inclined groove 42 as the groove width of the wide gradually inclined groove 42 becomes small. Furthermore, at the time of 35% abrasion, the groove width of the narrow gradually inclined groove 40 becomes large, but as height of the land part 44 is decreased and land part rigidity is increased, generation of the heel and toe abrasion is restrained. |
