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Discussion Starter · #1 ·
I have a 2013 Trek Marlin Gary Fisher Edition bike and my left crank arm became loose and the mounting point is a bit warped. It has the shimano fc-m311. What is the best way to fix this issue? Replace the crank arm, replace the crankset? If so what would be something that would work for it? thanks!:thumbsup:
 

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Yup, new crankset will be your best bet. Might as well pick up a fresh chain to go with the fresh rings too.
 
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