Sandra, the formula is you take the tooth number of the front chainring and divide it by the tooth number of the back cog to get the gear ratio. You can then multiple that by the diameter of your wheel in inches (generally near 27 for a 700c wheel) to get gear inches.Originally Posted by sandra
(24/34) x 27 = 19
I think I learned this last year from Sheldon Brown's website or some other website.
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Thread: Kona Ute
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11-20-2007, 12:31 PM #13
Ooo, talk tri to me!
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Last edited by HillSlugger; 11-20-2007 at 12:33 PM.
I'd rather be swimming...biking...running...and eating cheesecake...
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2008 Cervelo P2C Tri bike
2011 Trek Madone 5.5/Cobb V-Flow Max
2007 Jamis Coda/Terry Liberator
2011 Trek Mamba 29er
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