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  1. #1
    mtbr member
    Join Date
    Feb 2008

    Sizes of frames and rear triangle


    I have GT XCR 4000 (L size) from 1999. I do not have mount place to dics brakes on rocker arm.
    I can buy rear triangle (rocker arm) but I do not know which size is it. Different size frames has a different size of rear rocker arm?

    Will i-drive parts from my bike be suit to a newer rear triangle?

    Best regards

  2. #2
    mtbr member
    Join Date
    Nov 2004
    All the swingarms are the same size. What changes the size of the bike is the front triangle. You should try and find a rear triangle (swingarm) closer to your year and model. Try and get a 2001 XCR 4.0. That may be your best bet. Other than that you may not be able to do the upgrade to disc. Good luck.


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