FRONT CHAINWHEEL, FC-M6000-3 DEORE, FOR REAR 10-SPEED, 2-PCS WITHOUT CG, W/O BB PARTS Shimano Deore Hollowtech II Crankset is designed for efficient power transfer and smooth shifting. Optimized gear combinations and ratiosComposite Chainring with close step tooth profile for smooth shiftingSingle spike structure for stable shifting Item SpecificationsPedal Spindle9/16"Rings40/30/22BB IncludedNoCrank Length (mm)175Drivetrain Speeds10Number of ChainringsTriple