My 2005 trek fuel ex7 has a kink in one of the chain links. It is noticeable only when spinning the crank backward. It will jump a tooth on the derailer. Also I believe this is the cause of the skipping problem that I am having when in fifth thru seventh gear hard. Tried oiling the chain but it still has a kinky chain link. What is the cause of this and do I need a new chain?
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Thread: Kink in my chain