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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
What do you think about this product?
February 18, 2019
This is a reasonably priced reliable crank. XT is a workhorse groupset and will not let you down.
August 7, 2018
Just bought a boost bike with low end cranks? Get these beauties and you are on your way to total domination.
April 25, 2018
Nice crank set at a great value.
April 25, 2017
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.
January 14, 2017
Black bike, black cranks!
These work perfectly for my custom SB6 build, and look really good with the matte black frame!
July 6, 2016
Needed these for a newer boost frame. While they're not the cool metalic shiny finish of the XTR's, they still look pretty baller on a black bike.
July 1, 2016
Have you been boosted? I you have a boost frame then you need a boost compatible crank. This is shimano's offering. The difference is 3mm.
January 25, 2019
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?
January 29, 2019
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.
March 9, 2018
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?
April 11, 2017
What is the difference between the "boost" and standard version of this crank?
September 11, 2017
May 25, 2016
What's the bcd or do you have to use proprietary shimano chain rings?
March 9, 2018
Bolt Circle Diameter 96mm. There are many other brands offering chain rings with a 96 BCD.