Thread: Setting tire size on Sigma BC906 maybe a simple thing for someone that knows.
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Old 07-02-09 | 03:50 PM
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Wanderer
aka Phil Jungels
 
Joined: Apr 2005
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From: North Aurora, IL

Bikes: 08 Specialized Crosstrail Sport, 05 Sirrus Comp

Take the large and small numbers, the difference is 19, divided by 125. Multiply the answer by 15, and add to 2114.

Simple extrapolation.
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