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Was packing up my bike for travel last night, and went to remove the rear derailleur - a Shimano XT. Accidentally undid the bolt [i]next[/i] to the one that attaches to the mech hanger - and a thin little perforated shim on the spoke side of the bolt dropped out.
Of the many things I don;t know, here are the top three:
a) what it is
b) how to put it back
c) how significantly it might alter the performance of the mech
Feel free to wrap any advice in withering derision.
Thanks
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Is it part 2?
I believe so.
Im assuming its the circlip in part 1 and did the same in a rush to get the mech off. Just popped it back on, using a flat screwdriver to push it in place
Edit. In that case ignore me
Thanks folks.