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Old 05-08-07, 02:56 PM
  #5  
Revolution Smmr
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Join Date: Oct 2006
Location: Brooklyn, NY
Posts: 349

Bikes: 1970s Gazelle 10 spd -- Cheap 1980s no-name conversion

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you seem to know what you're doing, but just in case... is the chainring biopace/ovaltech/some other form of eliptical chainring?
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