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  • Shimano - XT FC-M8000-B1 Boost 1x Crank Arms - Black
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Shimano XT FC-M8000-B1 Boost 1x Crank Arms

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sale $119.99 $149.99

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    • Black, 170mm
      sale $119.99


    7 Reviews


    More everything.

    Shimano’s famous for its commitment to trickle-down tech and, sure enough, there’s plenty top-shelf inspiration to be found in the XT FC-M8000-B1 Boost 1X Crank Arms. Obviously, they’re designed to play nicely with Boost 148 rear axles, with a 3mm offset chainline that keeps your links running smoothly between cassette and chainring. The more expensive XTR’s Hollowtech II construction has also trickled down to XT, letting you save weight and cash, and the new 1x11 platform lets you enjoy so much gear that you’ll practically be moving backwards on those steep climbs.

    • Crank arms for efficient power transfer on varied terrain
    • Cold-forged aluminum construction provides lightweight strength
    • Hollowtech II construction reduces weight and maintains rigidity
    • 11-speed compatibility improves gear-range possibilities
    • Asymmetrical design enhances strength strategically
    • Compatible with 3d Composite Chainrings (sold separately)
    • Item #SHI00AX

    Tech Specs

    Arm Material
    aluminum, stainless steel
    Arm Length
    170mm, 175mm, 180mm
    Bolt Circle Diameter
    BB Type
    BB-MT800 / BB-MT800-PA
    Recommended Use
    cross-country, downhill, enduro, trail
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Lightweight. Durable.

    • Familiarity: I've put it through the wringer

    Because that's what defines XT, right? This is a great choice for people who are prone to bashing cranks on rocks, but still want something that is good quality and will hold up to said beating.

    My bike is boosted. I'm replacing a Race Face Aeffect that has threads stripped out of the crank arm. Will this XT set fit in a RaceFace TypeX bottom bracket?

    Hello Chris,

    Both the Aeffect crank and this Shimano crank feature a 24mm spindle so this will be a direct replacement without a need to replace your bottom bracket. Please feel free to reach out to us if you have any additional questions or need anything else.

    Unanswered Question

    Is the spider on this crankset specific for 1x or does it also accept 1 or 2 rings like the non-boost version of the XT M8000 1x11sp crankset?