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  1. #1
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    chainring/crank compatability

    Have a 2010 GF Hi Fi Pro with Shimano XT-M770 crank. Came stock with a 44-32-22. I converted to 10 speed and took off the 44. Now I want to change to 38/26 rings. Will those rings fit on the crank I have?
    Thanks

  2. #2
    mtbr member
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    Yes, you can run a 38 as long as it has a BCD of 104mm and a 26 with a BCD of 64mm. (BCD is "bolt circle diameter").

  3. #3
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    I checked and it does. Thanks for your help!

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