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Old 12-28-12 | 06:36 PM
  #2  
tandem rider
Senior Member
 
Joined: Dec 2005
Posts: 400
Likes: 11
From: Indianapolis, IN

Bikes: Co-Motion tandem, Serotta, and Specialized mt. bike

I clean my rotor with alcohol every few weeks. It is surprising the black gunk that comes off the rotor.

Sheldon
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