Thread: 42/17 or 42/16?
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Old 09-30-04 | 07:21 AM
  #8  
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riderx
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From: Fredrock
Originally Posted by SSenorPedro
Hmm, I used the SSconvert program to give me number based upon 700c wheels. Interesting discrepencies.

And I thought I was so tough...
Formula:
diameter of the drive wheel, times the size of the front sprocket divided by the size of the rear sprocket.
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