| 摘要 |
PURPOSE: To remarkably improve the wet drainage performance and improve the abrasion resistance by securing the excellent steering stability, etc. CONSTITUTION: A plurality of' inclined main grooves 2 which extend in the direction spreading upwardly from the lower part are formed, having a pattern center C as boundary, in the plane view of a tire in the installation attitude onto a vehicle, and the first inclined subgroove 4 is branched from each inclined subgroove 2 toward the tread end side, and the second inclined subgroove 5 is branced from the first inclined subgroove 4, and these inclined subgrooves 4 and 5 are extended free from the crossing with any other groove, and each branched point is positioned within 1/4 of the tread width TW from the pattern center C, and the change of the angle for the tire circumferential direction of each groove 2, 4, 5 is set at most 30 deg.. |
