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  1. #1
    mtbr member
    Join Date
    Mar 2013

    XTR10spd Dynasys RD-M981 Rear Derailleur with Dura Ace 10spd SL-BS79 Bar end Thumbie

    So I'm building a fatbike in preparation for some Alaskan Winter riding and want to use a Dura-Ace 10spd SL-BS79 bar end shifter I have mounted to a Paul Components Thumbie. I also have a never used XTR 10spd Dynasys RD-M981 rear derailleur laying about but I am aware of the issues involving the dynasys series components with basically anything else out there. So... here are my questions:

    1. Are there any mods out there to make my Dura-Ace bar end shifter work with my XTR Dynasys Derailleur? If so, could you provide links and/or diagrams?
    2. If there is no hope for my shifter, are there any other bar-ends that I could use? If not, is there any shifters out there other than the normal dynasys trigger shifters I could use (I hate trigger shifters for cold riding)?
    3. Can I use any XTR 10 spd Cassette or must I use a dynasys specific cassette?
    4. I want to run a 1x10 drive train with a non-sloping front chainring - is this possible or must I find some dynasys specific front ring?
    5. Will I need a specific 10spd Dynasys Chain?
    6. Why'd Shimano go and make so much trouble for me?

    Thanks for any help you can offer (if any one out there has any XTR 10spd non-dynasys equipment maybe we could swap). Cheers!

  2. #2
    mtbr member
    Join Date
    Mar 2013

  3. #3
    mtbr member
    Join Date
    Nov 2011
    A 9 speed MTB rear derailleur will work fine. A 10 speed won't without some sort of hack.

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