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  1. #1
    Junior Member
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    Dec 2010
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    2009 Specialized CrossTrail Sport, 2011 Giant Defy 1
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    Replacing a Derailer Hanger

    During my morning ride today, my chain went snap and pop, followed by an awful sound as the rear derailer was yanked from its mount. Luckily, it seems that the only real damage was the hanger (snapped in two). The root problem was broken link in the chain, its toast; but it was old anyway. Other than the broken derailer hanger, there doesn’t seem to be any damage to the wheel/spokes.

    My question is, can I simply buy a new derailer hanger and bolt it in place of the broken one? Or does the rear derailer system need to be aligned? I have average mechanical skills, but absolutely no experience adjusting derailers other than tweaking the barrel adjusters.

    The bike is a 2011 Giant Defy 1 (the Al version) with all 105 components.

    Thanks!
    Greg

  2. #2
    ˇSenor Member! time bandit's Avatar
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    Jul 2007
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    It might be as simple as bolting the new RD hanger on and then remounting the RD itself. Most likely, you'll need to align the hanger. You may want your LBS to take care of this task.

  3. #3
    Senior Member JTGraphics's Avatar
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    Dec 2006
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    If it is only the hanger that was damaged then yes remove old one and reinstall the new one and your as you say average mechanical skills you should be ok with adjusting the barrel adjusters.
    It may not be fancy but it gets me were I need to go.
    http://www.jtgraphics.net/cyclist_bicycles.htm

  4. #4
    ˇSenor Member! time bandit's Avatar
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    or grab one of these...

  5. #5
    coprolite fietsbob's Avatar
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    Jun 2010
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    NW,Oregon Coast
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    Dozens of different replaceable derailleur hangers ,
    The LBS, here has a Wall chart to match them up by sight comparison..

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