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  1. #1
    mtbr member
    Reputation: bikerboyj17's Avatar
    Join Date
    Dec 2007

    Shimano XT 10 Speed Question

    Can I use the old rear derailleur (M772 XT Shadow SGS Long Cage) along with the new 10 speed shifters and cassette? I believe I can use a 9 speed crank, chain, and front derailleur with the 10 speed set-up right? I'm trying to figure out what I would need to purchase in order to convert to 10 speed.

  2. #2
    ups and downs
    Reputation: rockyuphill's Avatar
    Join Date
    Nov 2004
    The new MTB 10 speed isn't compatible with old derailleurs. 10 speed road shifters would be compatible with the old derailleurs.
    I'm a member of NSMBA and IMBA Canada

  3. #3
    mtbr member
    Join Date
    Oct 2007
    I just found out the hard way that you cannot do this. The dyna sys shifters pull twice as much cable per shift as 9 speed shifters. So it shifts two gears for every one push of the lever. You can use 10 speed flat bar road shifters with a 9 speed rear derailleur though. But the flat bar road shifters cost more than a 10 speed derailleur, so not much point in getting them.
    2012 On One Whippet 650b
    2012 Santa Cruz TRc 650b
    2014 On One Dirty Disco
    2010 Soma Groove
    1987 Haro RS1

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