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Maintenence question - rear derailleur

  • 22-10-2009 9:33am
    #1
    jman0
    Closed Accounts Posts: 731 ✭✭✭


    So my commuter bike's rear derailleur cable snapped.
    This is the 2nd one that broke in about, 8 months?
    Par for the course?

    Anyway i'm willing to just leave it alone since my commute is rather short.
    And pretend the bike is a fixie.
    However, the alignment of the rear derailleur is keeping the chain on the very last of the cogs (toughest gear). Is that normal?
    Can i somehow adjust this so it's a couple cogs up the cassette?
    Therefore i'd be in an easier gear and i'll just maybe leave it there forever?


Comments

  • #2
    Chips Lovell
    Moderators, Politics Moderators, Sports Moderators Posts: 24,269 Mod ✭✭✭✭Chips Lovell


    jman0 wrote: »
    So my commuter bike's rear derailleur cable snapped. This is the 2nd one that broke in about, 8 months?
    Par for the course?

    No, it's quite unusual in my experience.
    jman0 wrote: »
    However, the alignment of the rear derailleur is keeping the chain on the very last of the cogs (toughest gear). Is that normal?

    Yes
    jman0 wrote: »
    Can i somehow adjust this so it's a couple cogs up the cassette?

    Adjusting the lower limit screw up to it's maximum will probably bring it up a cog or two but you probably won't get a massive difference since it isn't designed to do that.

    I'd get a new cable if I were you and maybe try a different bike shop in case their fitting it incorrectly (although it's a pretty hard job to mess up).


  • #3
    seamus
    Registered Users, Registered Users 2 Posts: 68,317 ✭✭✭✭seamus


    jman0 wrote: »
    This is the 2nd one that broke in about, 8 months?
    Par for the course?
    If you replaced the inner without inspecting the outer, it's possible that the end of an outer is frayed and wearing down the inner quicker than normal. Roughly I'd replace an outer every second time I replace the inner, but if it's frayed, just replace it.
    Therefore i'd be in an easier gear and i'll just maybe leave it there forever?
    Just get a fixie :)


  • #4
    blorg
    Registered Users, Registered Users 2 Posts: 15,995 ✭✭✭✭blorg


    Replacing a cable is very easy and cheap, you could do it yourself if you have a cable cutters.

    Just replace it.

    In my own experience on a 10 speed cassette you can typically get it 4 gears in using the limit screws, maybe only 3 if you want it on the cog well with no rubbing. This is 14T-15T on a typical 12-whatever cassette.

    If you want to go SS do it properly with a conversion kit.

    I've had a couple of gear cables snap but that is over a cycling lifetime, sounds like you were just unlucky.


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