cyclist/gearhead/cycli...
Join Date: Oct 2004
Location: DC / Maryland suburbs
Posts: 4,166
Bikes: Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
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My guess would be the front derailer cage is at a slightly wrong angle. My girlfriend's bike had the same problem and it was very frustrating for her for a while.