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Old 06-12-08, 11:06 AM   #1
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Join Date: Jun 2008
Location: Whitby, Ontario. Canada!
Bikes: Giant TCR Composite (2005), with 2007 Campy Chorus
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Occasional chain jump with '07 Chorus

Hi All

I just installed a 2007 Campy Chorus group on my Giant TCR Chorus and after 250km it's working beautifully except for one thing... the chain will occaionally jump a tooth (on the cassette I think). It never jumps while I'm pedalling though, only upon resuming pedalling after coasting, or waiting for a light or something like that.

The cassette is kept sparkly clean, and the chain was brand new. It's kept clean and properly lubed with Tri-Flow. I took the bike to my LBS to join the chain with the proper Campy tool and the joined link moves freely as it should. Shifting up and down is flawless, and without actually using a hanger tool everything looks properly aligned.

Any ideas?

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