| 摘要 |
PROBLEM TO BE SOLVED: To improve performances on snow and on ice in a well-balanced manner. SOLUTION: In this pneumatic tire, a tread part 2 is provided with at least four longitudinal main grooves 3 including a pair of inner longitudinal main grooves 3a arranged on both sides of the tire equator and continuously extended in the tire circumferential direction and a pair of outer longitudinal main grooves 3b arranged in the outer side of the inner longitudinal main grooves 3a and continuously extended in the tire circumferential direction. To the inner longitudinal main grooves 3a, lateral grooves 4a, 4b are opposingly connected from the tire equator C side and the tread grounding end E side, so as to form inner groove crossing parts 7 with cross shapes. To the outer longitudinal main grooves 3b, lateral grooves 4b, 4c are opposingly connected from the tire equator C side and the tread grounding end E side, so as to form outer groove crossing parts 8 with cross shapes. The width of the lateral groove in the outer groove crossing part 8 is set larger than that in the inner groove crossing part 7. COPYRIGHT: (C)2008,JPO&INPIT |
