| 摘要 |
PROBLEM TO BE SOLVED: To suppress occurrence of biased wear and puncture and to deliver excellent performance of a tire on condition that a maximum negative camber angle is 3 deg. when the tire is mounted to a vehicle. SOLUTION: Based on a tire outer diameter OD, a tread width TDW, and a camber angle CA, an amount of drop (x) from the tire outer diameter OD at a tread end is calculated from x=sin[CA]×[TDW]/2-tan([CA]/2)×[OD]/2), and a radius RO of a virtual arc passing a position P, which is the amount of drop (x), and a position O where a center line CL crosses a tread surface and having a center on the center line CL is calculated. A tread comprises a center radius R1, an adjacent radius R2 and a shoulder radius R3. A distance (a) between the line CL and an inflection point of the radius R1 falls within a range of 0.50-0.75×[TDW]/2. The radius R1 is equal to 0. 9-1. 1×RO, the radius R2 is equal to or greater than 0.10×R1, and the radius R3 is equal to 0.05-0.15×R2.
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