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  1. #1
    mtbr member
    Reputation: Gsromich's Avatar
    Join Date
    Nov 2009
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    187

    swinggy derailleur

    My Rear derailleur has ben making noize when i go off of bumps. When i go of the curb at low speeds my rear derailleur swings up and hits the frame and cogs. This never happened on my old bike. what can i do? is it just a defective product. Its a deore on my 10 Gf Wahoo Disc.
    "A day without sunshine is like, you know, night."
    Steve Martin

  2. #2
    Former Bike Wrench
    Reputation: mtnbiker72's Avatar
    Join Date
    Jan 2007
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    15,985
    after reading your post...I can't help but notice the irony of your Avatar

  3. #3
    mtbr member
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    Mar 2007
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    199
    Try a neoprene chainstay protector like Lizard Skins for about $10. It will muffle the noise. You could also try to glue a piece of dense foam or something to the derailleur where it's contacting the frame. The other option is to buy a derailleur with a stiffer spring, like the SLX or XT....it helps.

    Until recently, all derailleurs did that. The newer SLX and XT models use a stronger spring for that reason....lighter springs can give better shifting performance but mountain bikes have other concerns.....Shimano finally addressed that. The Sram derailleurs are better than the older/cheaper Shimano ones, but not as good as the new Shimano in that regard.

    You might check to be sure that your chain was cut to the proper length before it was installed, but that's not going to affect the frame-banging a whole lot. It just happens.

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