Shimano’s HOLLOWTECH II crank construction offers a lighter and stiffer crank design with a 178mm Q-Factor and a 55mm chainline. 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 M8120 including a 55mm chain line, ensuring that the drivetrain is optimized for a greater variety of frame designs.