The Shimano Deore XT FC-M8120-1 is the Boost version of the XT 12-speed crank, with a 55mm chainline and 178mm Q-factor for 148mm rear spacing and generous tyre clearance. Direct-mount chainrings and Shimano's Dynamic Chain Engagement+ tooth profile keep the chain put on rough ground.
- 1x12-speed, direct-mount chainring interface
- 55mm chainline, 178mm Q-factor — for Boost 148mm frames
- Two-piece HOLLOWTECH II aluminium construction, 24mm steel spindle
- Crank lengths 170mm and 175mm
- Supplied without chainring or bottom bracket

