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Shimano XT FC-M8000 1x Crank Arms

Sale $97.99 - $130.99

Item # SHI009A

9 Reviews
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  • Black, 170mm ($130.99)
  • Black, 175mm ($97.99)
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Item # SHI009A

Winning the one-by race.

The latest generation of Shimano's road and mountain drivetrains has seen some pretty extravagant changes. Of the changed groups, none may be as heavily altered as the new XT, and the biggest changes worth mentioning may be those resulting in the XT FC-M8000 1x Crank Arms. With trickle-down technology like Hollowtech II construction and smaller bearings with improved seals, Shimano's XT Cranks may be winning the race to provide the self-sponsored racers of the world with one-by drivetrains.

While the improved bearings are nice in that they're lighter, smoother, and have less chance of debris gumming them up, we have to admit that bearing issues have never been one of our great concerns with Shimano kit. Ditto crank arm stiffness, and the Hollowtech II cold-forging process is a big reason why. Despite making the crank arms hollow to save weight, Shimano's cold-forged construction doesn't sacrifice strength or efficiency, so the crank arm assembly is both lighter and stronger than designs with solid arms. Installation is just as easy as you'd expect, with the simple, durable, and effective thru-axle and pinch bolt design returning to celebrate yet another year as the amateur mechanic's favorite system.

  • Upgraded crank arms ready for everything on-trail
  • Lighter construction delivers impressive durability
  • Improved bearings roll smoother and are better protected

Tech Specs

Arm Material:
cold-forged aluminum
Arm Length:
165 mm, 170 mm, 175 mm, 180 mm
Chainring Sizes:
30 t, 32 t, 34 t
Bolt Circle Diameter:
96 mm
Rings:
1
Spindle:
24mm
Compatible Components:
Shimano 11-speed one-by drivetrains
Recommended Use:
mountain bike
Manufacturer Warranty:
2 years

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Reviews & Community

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Will this fit my 2016 beargrease carbon x7? I believe it has a 41x121 bb. Or do you have better/similar recommendations from raceface? Thx!

They have boost and fat bike sizes. Cheer´s

Avg. ride time: 4h 4m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Great crank

  • Familiarity: I've put it through the wringer

This is a really great crank. Not too pricey, but good and stiff, and looks good too! I put a red AB oval ring on mine, and it is a sight to behold!

Great crank

Wife's Upgrade

  • Familiarity: I've put it through the wringer

I purchased a stock Specialized Rumor for my wife and have been upgrading components as time/money permit. For $95 you will never find a better set of crank arms. I am changing her over from a 3 x 9 to a 1 x 10 system with XT all the way through. Great purchase, easy to maintain and will take any physical abuse you want to apply to them.

Avg. ride time: 3h 46m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Press fit or threaded bottom bracket ?

Hi Blair,



These will work with a few different bottom brackets, it will depend on which frame these are going into.

Works great!

  • Familiarity: I've put it through the wringer

These are used on a trail bike with a 32 tooth OneUp ring. Chain line is great, no issues after several hundred hard miles.

Unanswered Question

Why would this only work with 11 speed? Couldn't it work with a 10 speed single as well?

Solid Performer

    I've had about a half dozen rides so far on my complete XT 1X11 set up, on mixed single-track, moderate downhill and serious climbs. So far I love it! I know it's not as light as the SRAM drivetrains, but the cost and simplicity of the drivetrain swap pays big time. No dropped chains, no mis-shifts. I'm really loving it. Coming from a 3X or 2X set up, I don't have the top-end road speed, but who cares! If you're thinking about upgrading, do it.

    good cranks, no BB

      The tech specs made me beleive that this came with a shimano bottom bracket, but the crank arms do not. Still real solid crank arms to say the least but wish for the price it came with a bottom bracket, for the same price I could have gone with a zee crankset and it would have come with chainring and BB

      Unanswered Question

      Hi,
      I have a Scott Spark 950 with shimano fc m622 crankset, will this xt crankset fit with the bottom bracket installed? I think its BB92

      Does this crankset come with a bottom bracket??

      Hi Ruben,

      No, these crank arms do not come with a bottom bracket.

      If you have any other questions, feel free to reach out to me directly.

      Thanks,

      XT is Awesome

      • Familiarity: I've put it through the wringer

      I love the new 1x11. I have waited some time for XT to come out with the 1x11 for a upgrade and it was well worth the wait. Flawless shifting and light weight.

      Great way to go 1x

      • Familiarity: I've used it several times

      Shimano XT has always been my number one choice for drivetrain and brakes. The value provided is the best in the industry and as the years go on, XTR technology always trickles down to the XT level.

      The new M-8000 series cranks are no exception to the above statement. The cranks are plenty light and stiff and are easily mounted with their thru axle and pinch bolt design. It is worth noting to absolutely follow the torque specs for the pinch bolts printed on the non-drive side crank. Tighten the bolts in sequence, to assure even clamping force, make sure the plastic clip is seated and flush, and use a torque wrench to achieve the recommended setting. Ride your bike then check these again.

      All in all these are a great crankset, packing performance and value in a sleek black package...About that black finish-
      The black coating is wearing off very quickly due to shoe contact with the crank, leading to a polished surface beneath. This doesn't really bother me, but it can be a bit unsightly. A person could use one of the many aftermarket crank protection films on the market, or some clear 3M tape.