M8100 HOLLOWTECH II crank construction offers a lighter and stiffer crank design with options for both front single and double chainrings in three Q-factor options, including a Super Boost option (172mm, 178mm, 181mm). Chainrings are easily exchanged with the new direct-mount system and the cranks can be swapped between single and double front chainring setups. All Shimano 12-speed direct mount chainrings are interchangeable. Additionally, Shimano refined chain line specifications for DEORE XT M8100 including a 55mm chain line, ensuring that the drivetrain is optimized for a greater variety of frame designs.
FC-M 8100-1, FC-M8120, and FC-M8130-1 Cranksets
- Single front chainring
- Chainring options: 28, 30, 32, 34, 36T
Three Q-Factor and chain line options:
FC-M8120-1
- 178mm Q-Factor
- 55mm chain line works with 148 O.L.D.
- Prioritizes frame and tire clearance
FC-M8130-1
- 181mm Q-Factor
- 56.5mm chain line works with 157 O.L.D.
FC-M8100-1
- 172mm Q-Factor
- 52mm chain line works with 142 or 148 O.L.D.
- Prioritizes narrowest possible Q factor
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