The Shimano Deore XT FC-M8100-2 MTB crankset offers a rigid and lightweight design with the compatibility of Hollowtech II technology for aggressive trail riding. FEATURES: Direct mount chainrings with special gear tooth profile for improved chain retention Rider tunable with an exchangeable single/double direct mount chainring 172mm Q-factor For 48.8mm chainlines For use with HG 12-speed chains SPECS: Number of Chainrings: Double Color: Black Pedal Spindle: 9/16" Crank Intended Use: Mountain Crank Length (mm): 175 Chainline/Hub Compatibility: 135/142 MTB Hubs Rings: 36/26 Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 12 BB Included: No Weight: 654