Bike Forums - View Single Post - Determining gear ratio?What's the formula?

12-15-03 | 07:35 PM

#2

Stubacca

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From: Oztraylya

Bikes: '03 Fuji Roubaix Pro; '03 KleinGi Attitude; '06 Soma Rush; '04 Surly Cross-Check; '06 Soma Rush; '07 Scott CR1 / Chorus

Quote:

Originally Posted by Limba

Is it divide the chainring by the cog then multiply by 27?

Sort of.

Gear Inches = (Chain Ring / Free Wheel) * Wheel Diameter (including tire) in inches

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Last edited by booyah; 12-16-03 at 09:36 AM.

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