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ShimanoXTR FC-M9020-B1 Boost Crankset

Sale 5% Off$520.73 $549.98

Item # SHI00KU

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  • Grey, 175mm 30T ($520.73)
  • Grey, 175mm 32T ($520.73)
  • Grey, 175mm 34T ($520.73)
  • Grey, 170mm 30T ($520.73)
  • Grey, 170mm 32T ($520.73)
  • Grey, 170mm 34T ($520.73)
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Item # SHI00KU

XTR FC-M9020-B1 Boost Crankset

Meticulously crafted for the most discerning of trail riders and enduro racers, the XTR FC-M9020-B1 Boost Crankset embraces Shimano's HollowTech II cold forged crank arms that significantly reduce weight while boosting the overall strength and stiffness for pedaling efficiency. Overall, we'd recommend this crankset for those aggressive trail and all-mountain riders seeking something that'll reduce the weight, improve the strength, and look really nice on their Boost mountain bike, especially those running a 1x drivetrain without the need for a huge range of gears, seeing it plays nicely with Shimano's XTR 11 to 40-tooth cassette.

This particular XTR M9020 Crankset differs from the more XC-oriented XTR M9000 series crankset, in that its beefier design adds robust strength for riders and racers bashing their cranks across rugged stretches of trail on a regular basis. Also, it boasts a wider 168 millimeter Q-factor (versus the XTR M9000's 158-millimeter Q-factor) for increased stability when you're descending at high speeds, as well as offering a bit more clearance for the chainstays of modern trail and all-mountain bikes with Boost 148-millimeter rear spacing.

As its name suggests, this particular XTR M9020 Crankset is intended solely for bikes with Boost 148-millimeter rear axles, with its 53.4 millimeter chainline reflecting the 3 millimeter move outboard to accommodate Boost axle spacing. It comes with Shimano's XTR M9000 SM-CRM91 1x chainring in a number of sizes, so you can customize your drivetrain set-up with a 30, 32, or 34-tooth chainring, depending on the local terrain and your riding style. Additionally, you can choose between 170 and 175-millimeter crank arms, depending on your physical size and particular preferences while riding.

We'd recommend pairing this crankset and chainring with Shimano's XTR 11 to 40-tooth cassette for the best possible integration and the recommended threaded or Pressfit bottom brackets listed in the tech specs (neither the cassette nor the bottom bracket are included). Additionally, you'll want to use Shimano's HG-X11 directional chain for the best possible performance.

  • XTR FC-M9020-B1 Boost Crankset + M9000 SM-CRM91 1x chainring
  • XTR M9020 Cranks designed aggressive trail riding and enduro
  • Designed to be run as 1x11 drivetrain with XTR 11-40t cassette
  • HollowTech II cold forged cranks are lightweight, stiff, strong
  • M9000 1x chainring available in 30t, 32t, 34t for customization
  • 168mm Q-factor adds stability on the trail and chainstay clearance
  • 53.4mm chainline optimized for 148mm Boost rear axle spacing

Tech Specs
Arm Material
cold forged alloy
Arm Length
170mm, 175mm
Chainring Sizes
30t, 32t, 34t
Bolt Circle Diameter
[PCD] 96mm
Shimano XTR M9000 SM-CRM91 1x chainring (included with this crankset)
BB Type
[recommended Pressfit BB] Shimano SM-BB94-41A, [recommended threaded BB] Shimano SM-BB93
Q Factor
Compatible Components
Shimano XTR 11-speed components
Recommended Use
enduro, trail
Manufacturer Warranty
3 years

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

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Grey, 175mm 30T
Grey, 175mm 32T
Grey, 175mm 34T
Grey, 170mm 30T
Grey, 170mm 32T
Grey, 170mm 34T

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[XTR crankset with 30t ring] 601g, [XTR crankset with 30t ring] 593g

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