Bike Forums - View Single Post - Is my cadence calculation accurate?

10-31-07 | 05:50 PM

#7

FigBug

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Joined: Jun 2006

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Bikes: Glacier Team Ice, Cannondale XR800, Rocky Mountain Hammer Race, Specialized Big Hit Comp, Fuji Track Pro, Burley Tosa, Fiori Roma

I wrote a program to calculate it for me, the formula I use is:

inches_per_minute * cog / (pi * diameter * chainring) = rpm;

29568 * 14 / (3.1415 * 26.28 * 41) = 122.2

(1 mph = 1 056 inches per minute)

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