Shimano XT M8100-1 12 Spd Crank Arms - Gray


Product ID: GM121720-04

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keyboard_arrow_right Description

Shimano XT M8100-1 12 Speed Crank Arms

The Shimano XT FC-M8100-1 cranks provide for a smoother ride
The Shimano XT FC-M8100 1x cranks are based on a direct-mount system for quick chainring changes. Combine it with a Shimano Dynamic Chain Engagement+ chainring and you get a front drivetrain of the highest efficiency and low noise, which guarantees good chain retention. The stiff and lightweight design of the FC-M8100 cranks helps to increase the fun of riding on any type of trail.

Technical Information:

  • Series: Deore XT M8100
  • Crankarm Material: aluminium
  • Axle Material: steel
  • Crankarm Length: 165.0 mm, 170.0 mm, 175.0 mm, 180.0 mm
  • Chainline: 52 mm
  • Q-Factor: 172 mm
  • Axle Diameter: 24 mm
  • Compatible BSA Shell Width: 68 mm, 73 mm
  • Recommended Bottom Bracket: BB-MT800 or BB-MT800-PA Pressfit Hollowtech II (not incl.)
  • Recommended Chain: HG 12-speed (e.g. CN-M8100)


  • for 1x12-speed
  • suitable for 142 and 148 mm rear over locknut dimensions
  • smoother ride even on rough terrain
  • stiff and lightweight design accommodates aggressive trail riding
  • hollow forged crank arms maximize power transfer and minimize weight
  • anodised crankarms
  • SM-CRM85 1x chainrings available separately
  • also for 2x

Hollowtech II
What matters is the overall balance of the crankset. With regard to the entire crankset, an optimum ratio between the strength of the crank arms, the stiffness of the axle, the bearing position and other features is very important. During the development of the crankset, the overall balance of all individual elements was carefully considered in order to ensure maximum stability.
Outer bearing: On most 68 mm bottom bracket housings, the Hollowtech II 24 mm axle can be mounted outside the frame for better weight distribution and stability.
High-quality precision seals: The Hollowtech II set also features high quality precision seals in the bearing area to extend durability and maintain excellent rotation efficiency over time.
The axle and the 24 mm diameter bearings ensure optimum balance of the crankset and optimum transmission of power to the bicycle.

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