| 摘要 |
PROBLEM TO BE SOLVED: To design the tire so that increase of a tread resulted from compression of the tire during braking is caused by increase of width of the tread. SOLUTION: The vehicle pneumatic tire of a radial structure especially for a passenger car comprises a first profile region that includes a tread having a bent outside profile comprising a plurality of ranges having different radiuses in the view of cross section, includes a tire top at this case, extends symmetrically in relation to the tire top, and has a first radius TR1, second profile regions that connect to both sides of the first profile region, respectively, and have a second radius TR2, other profile regions that extend in a shoulder range in at least part and have a radius TRS. In the vehicle pneumatic tire of the radial structure especially for the passenger car, a size of TR2 is determined according to the equation 0.08TR1<=TR2<=0.25TR1 compared with a size of TR1, and a size of TRS is determined according to the equation 0.03 TR1<=TRS<=0.07TR1 compared with the size of TR1.
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