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Old 07-09-13, 06:28 PM
  #3  
cny-bikeman
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,510

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

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By lockup do you mean you can't pedal? that would have to mean that the chain has caught on something. It may be that there is too little clearance between the chain and right dropout, or that bolts holding a rack or fenders on are interfering. You may be flexing things enough to cause inteference only when you are pedaling hard, or it may interfere only when shifting quickly or under power.
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