Shimano Deore XT FC-M8120 Crankset – 12-Speed HOLLOWTECH II MTB Boost 55mm Chainline

Upgrade your mountain bike drivetrain with the Shimano Deore XT FC-M8120 12-Speed Crankset, engineered for efficient power transfer, excellent stiffness, and dependable performance on demanding trails.

The FC-M8120 features Shimano's proven HOLLOWTECH II technology, combining lightweight hollow-forged aluminum crank arms with a durable integrated 24mm spindle. Designed for modern 1x12-speed mountain bike drivetrains, this crankset offers excellent pedaling efficiency and reliable performance for XC, trail, and all-mountain riding.

With a 55mm chainline, the FC-M8120 is designed for wider rear hub spacing, providing additional frame and tire clearance compared with standard 52mm chainline cranksets.

Key Features

• Brand: Shimano

• Series: Deore XT M8100

• Model: FC-M8120

• Drivetrain: 1x12-Speed

• Crank Technology: HOLLOWTECH II

• Construction: Hollow-forged aluminum crank arms

• Spindle Diameter: 24mm

• Chainline: 55mm

• Q-Factor: 178mm

• Chainring Mount: Shimano Direct Mount

• Recommended Chain: Shimano HG+ 12-Speed

• Color: Black

• Application: MTB / Trail / All-Mountain

Technology & Benefits

HOLLOWTECH II Construction

Lightweight, rigid crank arms provide efficient power transfer while maintaining durability for demanding mountain bike riding.

Shimano Direct Mount System

Designed for Shimano direct-mount chainrings, allowing convenient chainring replacement and gearing customization.

55mm Chainline

Optimized for wider rear hub configurations, helping provide appropriate chain alignment and frame clearance.

12-Speed Compatibility

Designed to work with Shimano's 12-speed MTB drivetrain systems for smooth and efficient pedaling performance.

Compatibility

• Designed for Shimano 1x12-speed MTB drivetrains

• Optimized for 148mm Boost rear hub spacing

• Compatible with Shimano 12-speed HG+ chains

• Compatible with Shimano direct-mount chainrings

• Suitable for Shimano HOLLOWTECH II MTB bottom brackets, including BB-MT800 series

Important Notes

• Please verify your frame, bottom bracket, and chainline compatibility before purchasing.

• Chainring size, crank arm length, and included accessories depend on the selected listing option.

• Please refer to the listing photos for the exact items included.

• Professional installation is recommended.

Reference: Shimano technical specifications.