Thread: Favorite Fixed Gear Cog Size?
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Old 12-04-06 | 10:53 PM
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sivat
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Bikes: Bianchi Advantage Fixed Conversion; Specialized Stumpjumper FS Hardtail

Originally Posted by HB Crusier
how do you figure out gear inches
(chainring/cog)*wheel diameter in inches

you can use 27" to get a ballpark for most 700c or 27" wheels. For 700c to get fancy use 622+(2*tire size in mm)/25.4

For instance, running 48/17 with a 23mm tire
(48/17)*(622+2*23)/25.4=74.26 inches
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