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  1. #1
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    XT M778 Wheelset 2012 version, 142x12, freehub question

    I have heard issues with this wheelset having problems with the freehub.
    I want to go ahead and order a backup to have in the garage.

    Will any XT M770/775/785 8/9/10 freehub work or is it specific to the M778 with the 12mm size?

    I have not taken it apart so I don't know all the details. Hoping someone here can answer for sure so I can know what to order.

  2. #2
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    Do you really mean M778? As far as I know the M778 was a 2010/2011 model and was a 15mm front and standard QR rear. Do you mean M788 by any chance? That was 2012 and had a 142/12 rear.

    Assuming you mean M788 with 142/12 then the freehub model is Y-3TH98060, whereas the M788 with standard QR takes Y-3CZ98040. The M785 also takes the Y-3CZ98040 freehub, and the M775 takes a Y-3CZ98050.

    Based on which I'd say they're not interchangeable, and you'll need to order the one specific to your hub.

    By the way, when I wanted a new freehub for my M785 rear, I found it was actually cheaper to buy a whole new hub than just the freehub, and you get a spare axle, bearing cones. and ballbearings thrown in!
    Last edited by PerthMTB; 02-09-2013 at 05:36 AM.

  3. #3
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    XT M778 Wheelset 2012 version, 142x12, freehub question

    Yes, M788. Typo on my part. It is the 2012, 142x12. Thanks for the part number for the correct freehub.
    Also, good point about getting the whole hub to have the extra parts at a similar price to just the freehub.

  4. #4
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    Note you'll also need a couple of 17mm cone spanners and a massive 15mm hex key to remove/refit the freehub...

  5. #5
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    XT M778 Wheelset 2012 version, 142x12, freehub question

    I have the cone wrenches on order. Need 22 and 23 for the front too.
    15mm Allen have to find. I have a 14mm. Figures.

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