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  1. #1
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    Reputation: Westrider7's Avatar
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    SS chainrings for XT-770 crankset

    I need some advice on some non-ramped SS rings I can fit on the XT-770 crankset. Last I remember the fancy carbon spider that Shimano uses on this crankset makes it difficult to fit other brands.

  2. #2
    The need for singlespeed
    Reputation: zaskaranddriver's Avatar
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    You sure you named the right crank? XT M770 has an integrated aluminum spider that happily takes the ubiquitous 104bcd...

  3. #3
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    Quote Originally Posted by zaskaranddriver View Post
    You sure you named the right crank? XT M770 has an integrated aluminum spider that happily takes the ubiquitous 104bcd...
    Ya, it is a 4-bolt 104 bcd. I just thought the interface was goofy/proprietary for some reason...

  4. #4
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    Reputation: Nater's Avatar
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    It's the ring spacing that is goofy.

    If you're looking to run the M770 rings on a different crankset you may run into trouble.

    If you're looking to run a different set of geared rings on the M770 cranks you may run into trouble.

    I think many SS rings will work fine. I'm using a Surly stainless 34 tooth on mine no problem.

  5. #5
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    Quote Originally Posted by Nater View Post
    It's the ring spacing that is goofy.

    If you're looking to run the M770 rings on a different crankset you may run into trouble.

    If you're looking to run a different set of geared rings on the M770 cranks you may run into trouble.

    I think many SS rings will work fine. I'm using a Surly stainless 34 tooth on mine no problem.
    Ok, I thought I remembered running into that issue in the past. I just wanted to double check before I ordered an new chainring. I am eyeing a homebrewed ring at the moment and they don't mention a compatibility issue so I hope it goes on smooth.

  6. #6
    Mtbr Forum Sponsor - Homebrewed Components
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    Nope, it'll bolt up just fine!

  7. #7
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    Quote Originally Posted by ISuckAtRiding View Post
    Nope, it'll bolt up just fine!
    Ahh, look at that, its the homebrew dude right there!

    I am going to put one of your pink chainrings on my bike, with a gold chain, on a blue Karate Monkey. It's gonna be cherry. I'll send a pic.

  8. #8
    D.M.S.R.
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    No issues with a 104BCD. Just use some shorter chainring fasteners.
    SS chainrings for XT-770 crankset-dsc06923.jpg

  9. #9
    The need for singlespeed
    Reputation: zaskaranddriver's Avatar
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    That's not a stock finish...
    Some yummy crank porn there!

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