| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve drain performance while maintaining steering stability and noise suppression performance. <P>SOLUTION: This pneumatic tire has the designated direction of the mounting on a vehicle. The width W1 of an outboard shoulder main groove 3 is 3 to 4% of a tread grounding width TW, the width W2 of an inboard shoulder main groove 4 is 5 to 6% of the tread grounding width, the width W3 of an outboard crown main groove 5 is 6 to 7% of the tread grounding width, and the width W4 of an inboard crown main groove 6 is 6 to 7% of the tread grounding width. In each of the inboard crown main groove 6, the outboard crown main groove 5 and the inboard shoulder main groove 4, an outboard groove face's angle θ1 is more than an inboard groove face's angle θ2, wherein the angle θ1 is 13 to 19 degrees, and the angle θ2 is 9 to 14 degrees. In the outboard shoulder main groove 3, an outboard groove face's angle θ3 is 9 to 14 degrees, and an inboard groove face's angle θ4 is 5 to 8 degrees. The tread portion 2 includes outboard shoulder lateral grooves 12 and outboard middle lug grooves 16. <P>COPYRIGHT: (C)2013,JPO&INPIT |
