Loose Chainset Bolt

jannerman
jannerman Posts: 5
edited June 2007 in MTB workshop & tech
Hi All

I have a trek with a bontrager chainset. The only proble I am having is the bolt holding the left crank arm in place keeps working its way loose result in movement.

This doesnt happen on a ride with easy terrain but does on anything more difficult. Any advice on how to resolve it..

I probably need to replace the bolt too as its head is starting to go out of shape. soon I won't be able to tight it at all..

Any ideas...????

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