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  1. #1
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    xtr m9020 cranks to run m900o single ring, does this work?

    Hi MTBers,

    I had a customer come in to order the m9000 chain ring bolt caps & bolts, in the conversation he said that only the m9000 race cranks can run the specific m9000 single ring. This is due to the race's having a 10mm narrower chain line than the m9020 trail cranks.

    He was adamant he was right as he had researched it on the net.
    Me I run a custom Revolution Components 30T thick/thin ring made right here in New Zealand on my 180mm m9020 trail cranks with no issues.

    When I explained my ring was cheaper, lighter, made locally and I've never dropped a chain, all I got back was its not Shimano so it won't look right, and he's researched it on the net so he is right!

    So is this vet roadie/TTer/track/only ride my mtb on gravel roads racer right?
    I have heard of issues with the Big S single ring dropping chains......

    Cheers
    Conrad

  2. #2
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    He was probably referring to the XTR's Q-factor. The way I understand it, the new XTR's race crankset (M9000) have a Q-factor that is narrower than the XTR trail crankset (M9020). I think it has to do with race cranks being used for hard-tails and trail cranks being used for full suspensions. Not really sure but that's how I understand it.

    .

  3. #3
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    Quote Originally Posted by paxfobiscum View Post
    He was probably referring to the XTR's Q-factor. The way I understand it, the new XTR's race crankset (M9000) have a Q-factor that is narrower than the XTR trail crankset (M9020). I think it has to do with race cranks being used for hard-tails and trail cranks being used for full suspensions. Not really sure but that's how I understand it.

    .
    Yes the race have a 10mm narrower Q factor than the trail cranks Which I think is to do with the wider chain stays found on enduro bikes etc to accommodate wider tire/27.5+ etc.

  4. #4
    NedwannaB
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    Did he say it wouldn't look or "work" right? Big difference...
    Wait whuuut, who did he tell you that!?!?....

  5. #5
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    he said in his extensive research of the web that the single m9000 ring will not work with the m9020 trail cranks. The trail cranks were never designed for the single ring only the race versions were. This is interesting as the single ring is on the shimano parts spec sheets as m9000/m9020. So is he right?

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