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Old 03-07-15 | 08:08 PM
  #18  
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jetboy
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Joined: Oct 2007
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From: Oakland, CA

Bikes: centurion cinelli equipe, look hinault 753, Zunow z-1, 83 stumpy sport

I am betting the lug was damaged and someone cut it and fit a grub screw. ... maybe someone tried to pound a 27.2mm seatpost into it and destroyed it... the TT bike has the curved top tube and .. from what I read, both a grub screw and a clamp.
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