Tire profile: 50 or 55

[Ti Kan]

Tessie McMillan writes:
> Would there be any negatives -- aside from appearance -- associated with
> running a 205 x 50 x 15 tire instead of the 55? I do drive my street
> tires on the track on occasion....

Only speedometer error, due to a small shortening of the effective final
drive ratio.

Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  Difference
205/55-15         4.4in  11.9in    23.9in         75.0in        845        0.0%
205/50-15         4.0in  11.5in    23.1in         72.5in        874       -3.4%

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
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