| 摘要 |
PROBLEM TO BE SOLVED: To suppress partial wear of a shoulder block while securing traction property and wettability. SOLUTION: A block pattern is formed of lateral grooves 10 continuously extending between tread edges TE and narrow vertical grooves 11 connecting between the lateral grooves 10. The outer vertical groove 11a between the shoulder block Ba and the inner block Bb tilts with respect to the tire circumferential direction, and has an outer vertical groove deflection region Y, namely a tire axial region between both ends in the tire circumferential direction. The ratio Dga/Dy of groove depth Dga of the outer vertical groove 11a to groove depth Dy of the lateral grooves 10 is set at 0.7-1.0, and the ratio W1/Wga of deflection width W1 in the tire axial direction of the outer vertical groove deflection region Y to groove width Wga is set at 1.0-10.0. A tread surface 2S is formed of an inner profile section Si and an outer profile section So having a small curvature connecting with the inner profile section Si via a bending point P. In a normal ground state, the ratio L1/L2 of ground length L1 on the tire equator CO to ground length L2 at the tread edge TE is set at 1.0-1.2, and the bending point P is positioned in the outer vertical groove deflection region Y. COPYRIGHT: (C)2004,JPO&NCIPI |
