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Join Date: Aug 2006
Posts: 154
The following was originally posted here in another thread two weeks ago that I can't link to because I don't want to take the time to figure out how to do it.

MPH= (rpm x tire diameter) / (gear ratio x 336)

It gets a little more complicated because the R1200S has a step-up at the primary of 1:1.824 that needs to be accounted for. I think I am doing this right, but I'm sure one of the engineers will correct me if I'm wrong.

RPM is 8200
Tire Diameter is 26" (Pirelli 190/55zr17 slick)
Final Drive = 2.62
6th gear = .81:1

MPH = [(8200/1.824)*26] / (2.62*.81*336)

MPH = 116885.96 / 713.0592

MPH = 163.92

Old 11-10-2006, 12:41 PM
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