Thread: Replacing Biopace chainrings
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Old 04-18-20 | 01:11 PM
  #17  
CO_Hoya
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From: Colorado
Originally Posted by paulriccio
May I ask how you find the % change? 42/28 is 1.5 ratio and 39/28 is 1.39. Does the difference in ratio calculate percentage?
Yes, you have the correct idea. There are online tools for this sort of thing. For example: Link
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