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Thread: Just twisted my rear derailleur!!

  1. #1
    Senior Member Nad's Avatar
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    Just twisted my rear derailleur!!


    So yeh, my rear derailleur is a twisted mess

    Decided to do the grizedale loop this morning, got about half way round on a technical downhill section when my I herd the derailleur hitting the spokes. Tired bending it back as best as I could to finish the ride but the bike was un-rideable!
    Iv just bought a new chain (which I havent fitted yet) and now im after a rear derailleur but im not sure if I need a short, medium or long cage? I currently have 2 chainrings 36/24T at the front and a 9 speed 11-34T cassette.

    Thanks
    Rides: canyon torque 9.0 vertride

  2. #2

    Re: Just twisted my rear derailleur!!

    Medium cage should do you fine.

  3. #3
    Senior Member Sir_Queuesalot's Avatar
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    Re: Just twisted my rear derailleur!!

    Don't forget the mech hanger, or is that going to cause a kerfuffle again
    My site http://www.ezerider.com serving Staffordshire, South Cheshire & Derby

  4. #4
    Senior Member Nad's Avatar
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    Re: Just twisted my rear derailleur!!

    Don't forget the mech hanger, or is that going to cause a kerfuffle again
    Mech hanger? Is that the small bit between the dropout and the derailleur? If it is then i think it comes with the derailleur iv orderd..
    Rides: canyon torque 9.0 vertride

  5. #5

    Re: Just twisted my rear derailleur!!

    The mech hanger is the part of the frame that the rear mech bolts on to. On many frames this is a replaceable part (bike specific and won't come with the mech). In cases such as yours where the mech has been bent, this part of the frame often gets bent too. It needs to be straight for your gears to work properly, so if it has also bent then you either need to replace the mech hanger or, if it is not removable, get it straightened (possible with care and a large adjustable wrench but definitely a job best suited for a good cycle mechanic with the proper tool).

  6. #6
    Senior Member MTBLeague's Avatar
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    Re: Just twisted my rear derailleur!!

    They usualy don't cost too much, hanger I mean, mechs you can pay anything you like, best get like for like.

    See recent post re hanger debate.....it is a sacrificial part, it will die before your frame does, it's been designed that way.


    http://www.mbr.co.uk/forums/showflat...0/page/4#54591

  7. #7
    Senior Member DISGreece's Avatar
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    Re: Just twisted my rear derailleur!!

    If the mech is so badly fooked, the hangar is probably bent too.... replace it to keep your gear changing smooth and problem free!
    Ride hard but avoid the hikers

  8. #8
    Member harduphero's Avatar
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    Re: Just twisted my rear derailleur!!

    Take it to your LBS and have the frame checked for alignment too, just to be sure there is no more damage. Also when picking up a new mech hanger its good policy to buy two, just in case the same thing happens again!

  9. #9
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    Re: Just twisted my rear derailleur!!

    The hangar may or may not be part of the frame. My bike has a softer metal hangar that is supposed to bend instead of the frame. Worked so far. I have killed one derailier and two hangars in this way.

    A lot depends upon what you ride. So what do you ride and does it have a separate hangar (Worth carrying a spare if you do).

    Luck
    Sometimes I swear I can hear the Norns laughing

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  10. #10
    Senior Member Nad's Avatar
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    Re: Just twisted my rear derailleur!!

    The hangar may or may not be part of the frame. My bike has a softer metal hangar that is supposed to bend instead of the frame. Worked so far. I have killed one derailier and two hangars in this way.

    A lot depends upon what you ride. So what do you ride and does it have a separate hangar (Worth carrying a spare if you do).

    Luck
    Yeh my derailleur is attatched to a softer metal hanger which is the attatched to the dropout. you could easily see that the softer metal hanger was bent, so I also took the dropout off to check it out and thats only slightly bent by 1-2mm, hopefully im getting it strightend at work tomz.
    Iv got a new derailleur and have been looking for a replacement dropout and the only place I can find one is ebay from usa!
    Rides: canyon torque 9.0 vertride

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