Shimano Dura-Ace FC-09

The choice of the world's best climbers, sprinters, and time trialists, the DURA-ACE R9100 crank drops weight while maximizing power transfer. The new design, and its iconic look, is adapted for race specific disc brake systems while still offering a wide range of gearing and crank arm length options.Attributes BCD 110 BB Inclusion No Chainline 43.5mm Crank Spindle Diameter 24mm Interface Hollowtech II Crankset Material Carbon/Aluminum Pedals Thread 9/16'' Primary Color Black Speed 11 Drivetrain Spacing Road