Specification                                           Sidewall         Radius        Diameter         Circumference         Revolutions             Difference
Stock S70 T-5 size:   205/55-16                4.4 in           12.4 in        24.9 in               78.2 in                   811 / mile               0.0%
850R :                       205/45-17                3.6 in           12.1 in        24.3 in               76.2 in                   831 / mile              -2.5%
Replacement tire :      215/45-17                3.8 in           12.3 in        24.6 in               77.3 in                   819 / mile               -1.0%

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