| 摘要 |
PROBLEM TO BE SOLVED: To improve low fuel consumption by reducing rolling resistance, maintaining the wet resistant performance. SOLUTION: Relative to a groove depth Dg of a circumferential main groove 22s on a shoulder part side, a rib width Ws of the shoulder rib 23s is set in a range of 2.60≤Ws/Dg≤3.20, and a rib width Wc of a center rib 23c is set in a range of 2.35≤Wc/Dg≤2.70, and a rib width Wm of an intermediate rib 23m is set in a range of 2.35≤Wc/Dg≤2.70. Further, relative to the rib width Ws of the shoulder rib 23s, the rib width Wc of the center rib 23c is set in a range of Wc≤Ws, and the rib width Wm of the intermediate rib 23m is set in a range of Wm≤Ws. Further more, relative to the groove width Dg of the circumferential main groove 22s, a groove width Wg of each circumferential main groove 22 is set in a range of 0.40≤Wg/Dg≤0.70. COPYRIGHT: (C)2010,JPO&INPIT |
