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Old 03-21-10 | 04:32 PM
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merlinextraligh
pan y agua
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Joined: Aug 2005
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From: Jacksonville

Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike

^ Co-Motion specifically will not warant a Gates retrofit. According to them the BB's have to be exactly parallel. Before the Belt drive, they didn't allign the frames to the same tolerance that they do on the new ones in that regard.

If you get the chain line exactly straight, (which you can fine tune by sliding the eccentric side to side) and it still walks, it may be that the BB spindles are not precisely parallel.
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