Shimano Tiagra FC-4700 Cranksets Aluminum construction with anodized finish. 43.5mm chain line, 110mm BCD, 150 Q-factor. Crankset with integrated 24mm axle decreases weight and improves rigidity. Item Specifications: Color, Gray, Spindle Interface Type, Shimano Hollowtech II, Pedal Spindle, 9/16", Chainring BCD, 110 Shimano Asymmetric, Rings, 50/34, BB Included, No, Crank Intended Use, Road, Defined Color, Gray, Crank Length (mm), 172.5, Drivetrain Speeds, 10, Number of Chainrings, Double, Chainline/Hub Compatibility, 130 Hubs, Chainline/Hub Compatibility, 135/142 Road Disc Hubs > 415 mm Chainstay,.