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Re: Wheel to speed ratio questions



Robert Paul Andrews wrote:
> ...upgraded to 15" wheels...recalibrate the speedo


You can go to any size wheel, and by changing the aspect ratio of the
tire,
get the same diameter, therfore no speedo recal, no change in gearing.

section width (mm)/aspect ratio(dimensionless)-wheeldia(in)
Therefore a 205/60-15 has a diameter of
(205*0.60/25.4)+15+(205*0.60/25.4)inches

Glenn