| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the wet performance and the abrasion resistance performance of a pneumatic tire with excellent balance. <P>SOLUTION: A lateral groove 3 formed at a tread surface 2 includes a first part 3a extending at an angle θ1 with respect to the tire axial direction, and a second part 3b extending at an angle θ2 (≠θ1) with respect to the tire axial direction thereby having a first bent part 5. The lateral groove 3 also includes a third part 3c which is continuous with the second part 3b and extending at an angle θ3 (≠θ2) with respect to the tire axial direction thereby having a second bent part 6. When a tire is a new one, the bend angles θa0, θb0 of the first bent part 5 and the second bent part 6 are set to be 30-50°. The bend angles θa50, θb50 of the first bent part 5 and the second bent part 6 at 50% abrasion are set to be 0.35-0.65 times the angles θa0, θb0. In addition, a narrow groove 4b is formed which extends between the lateral grooves adjacent to each other in the tire circumferential direction, and connects the first bent parts 5 to the second bent parts 6 of these lateral grooves 3, consequently is inclined with respect to the tire circumferential direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
