| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve suppression performance of noise outside a vehicle while maintaining wet performance thereof. <P>SOLUTION: A pneumatic tire 1 includes at least two main grooves 31, 34 whose directions to the internal and external sides of the vehicle are designated if the same is mounted thereto and which is extended circumferentially along a tire's tread surface 21. In the pneumatic tire 1, each of main grooves 31, 34 facing each other on both sides of a tire's equatorial plane C is disposed by allowing the distances W1, W4 up to the tire's equatorial plane C from the center thereof to be within the range of ±10[%] and the width D4 of the main groove 34 of the innermost mounting part is formed to be 50[%] or above and 80[%] a below of the width D1 of the main groove 31 of the outermost mounting part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
