86(?) Rockhopper rear derailleur replacement- Mtbr.com
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  1. #1
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    86(?) Rockhopper rear derailleur replacement

    So yesterday my rear derailleur suddenly curled up and snapped in half. Any idea what may have caused that?
    Also, any recommendations on replacements? I've never had to replace any derailleur bits. Does the rear have to be matched to the front system? Any recommendations on what to replace it with?

  2. #2
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    Quote Originally Posted by Tandyman View Post
    So yesterday my rear derailleur suddenly curled up and snapped in half. Any idea what may have caused that?
    Also, any recommendations on replacements? I've never had to replace any derailleur bits. Does the rear have to be matched to the front system? Any recommendations on what to replace it with?
    Most common cause is catching a branch in the dérailleur and it wraps up and snaps. Other is overshift and chain jams inbetween spokes and cogs.
    If it just did it by itself i would say check the chain, might be twisted or frozen link.
    Critical point of compatibilty is the derailleur leverage ratio matches the shift lever. If you find something made for the same number of cogs on rear it should work. 86 is pretty old, that might be five or six rear cogs? Not going to find anything made currently i think. Maybe some really low end stuff?

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