Shimano XT FC-M8120-1 cranks - especially for 148 mm over locknut dimensions
The Shimano XT FC-M8120 1x cranks, unlike the FC-M8100-1 cranks, produce a chainline of 55 mm, so a 148 mm rear hub is recommended. It is based on a direct mount system that significantly accelerates chainring changes. In combination with a Shimano Dynamic Chain Engagement+ chainring, you get a front drivetrain of the highest efficiency and low noise, which also provides good chain retention.
Application: Enduro, All Mountain, Cross Country
Compatibility: 1x, 2x
Chainring Mount: Shimano Direct Mount
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: 55 mm
Q-Factor: 178 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 148 mm rear over locknut dimension
- 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
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.
Manufacturer Part Numbers:
170.0 mm: I-FCM81201CXX
175.0 mm: I-FCM81201EXX
- 1 x Shimano XT FC-M8120-1 crank
- 1 x Shimano lockring
- 1 x TL-FC41 chainring installation tool
- 1 x Shimano crank bolt
- 2 x spacer
What crank arm lengths are available for the Shimano XT 12 speed MTB cranks?
The Shimano XT 12 speed MTB cranks are available in 165 mm, 170 mm, 175 mm and 180 mm.
What type of chainring mount is compatible with the Shimano XT 12 speed MTB crank?
The Shimano XT 12 speed MTB crank is compatible with DIRECT MOUNT.
What is the chainline for Shimano XT M8120-1 12 speed MTB crank?
The Shimano XT M8120-1 12 speed MTB crank chaniline is 55 mm.
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