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  1. #1
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    Difference between FC-M8000-1 and FC-M8000-2?

    Hi,

    I just bought a new bike, which is equipped with the Shimano XT (M8000) groupset.
    It comes as a 2x11 setup, but I would like to convert it to a 1x11 as I do not need all the gears in the Netherlands.

    I have tried to find it on the Shimano (si.shimano.com) website and internet, but cannot really find a conclusive answer to my question:
    Is there a physical difference between the 8000-1 and 8000-2 crankset?
    All evidence I have found so far points towards the two being identical, but am hoping someone here has seen both and can either confirm or deny that.

    Thanks

  2. #2
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    Hi it's the same crank
    Just one comes with one Chainring and one with Two!
    The 3x crank is not the same.

    Happy cycling



    .

  3. #3
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    Difference between FC-M8000-1 and FC-M8000-2?

    You can convert your existing crank to 1X. It's fairly simple. You will need to replace the 36-26 with a single ring (probably 32 but maybe 30 or 34 depending on your riding). Here's a schematic for XTR, but XT is similar. Note that if you have a "Boost" 148mm rear axle on a newer bike you will need and extra 2.5mm spacer.

    http://si.shimano.com/php/download.p...9020-3776A.pdf

    Sent from my iPad using Tapatalk

  4. #4
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    Hi all, I am having a related problem. Just got my wife a 2017 remedy 9.8, which came with 2x11 XT boost drivetrain. To convert to 1x11, I removed the small ring, bolted up her desired single ring of choice, removed the front der, and done. Unfortunately, it has a horrible chainline (single ring is too far outboard). It has a perfect chainline when chain is on 5th smallest cog, and backpedalling on the largest cog (also installed 11-46 cassette) causes the chain to skip down. Is there a 1x specific spider for the M8000 XT cranks, or alternately, can I swap in a non-boost spider? There is currently tons of room to go inboard. I cannot find these parts called out separately anywhere with part numbers, and really don't want to have to buy a new crankset. I guess I could also install chainring spacers, but not sure I am comfortable with this. Any advice would be greatly appreciated...

    Thanks!
    Shawn

  5. #5
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    Quote Originally Posted by Briareos View Post
    Hi all, I am having a related problem. Just got my wife a 2017 remedy 9.8, which came with 2x11 XT boost drivetrain. To convert to 1x11, I removed the small ring, bolted up her desired single ring of choice, removed the front der, and done. Unfortunately, it has a horrible chainline (single ring is too far outboard). It has a perfect chainline when chain is on 5th smallest cog, and backpedalling on the largest cog (also installed 11-46 cassette) causes the chain to skip down. Is there a 1x specific spider for the M8000 XT cranks, or alternately, can I swap in a non-boost spider? There is currently tons of room to go inboard. I cannot find these parts called out separately anywhere with part numbers, and really don't want to have to buy a new crankset. I guess I could also install chainring spacers, but not sure I am comfortable with this. Any advice would be greatly appreciated...

    Thanks!
    Shawn

    Okay - for what it is worth, I called Shimano today and they confirmed that the Crank arm/spider for the M8000-B1 and M8000-B2 are the same. I cannot get the spider from an M8000-1 (non boost) and put it on my M8000-B2 (boost) to bring the chainring inboard. Spiders are apparently part of the crank... Looks like spacers in my future

  6. #6
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    It's been said a bunch on here, Shimano non boost cranks with oneup or AB rings give much better chainline on a boost frame.
    OG Ripley v2

  7. #7
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    Quote Originally Posted by TwoTone View Post
    It's been said a bunch on here, Shimano non boost cranks with oneup or AB rings give much better chainline on a boost frame.
    yep, I would agree completely. Unfortunately the bike came with a 2x boost arrangement, so I was hoping it would be possible to just change the spider. Since it isn't, 3mm spacers in conjunction with absolute black ring and 2x boost XT crankset give me a perfect chainline in the middle cog. Still cheaper than purchasing another crankset.

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