The Shimano Dura-Ace FC-R9200 crank performs two vital functions; transferring your pedaling effort into the drivetrain and ensuring the fastest, most precise front shifting available. With HOLLOWTECH II crank arms to ensure light weight and Shimano's class-leading chainring designs, the FC-R9200 won't let you down. FEATURES : Optimal balance of stiffness, strength, weight and rotational performance HOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting Note: Images do not reflect exact sizing SPECS : Q-Factor: 148mm Chainline : 44.5mm Number of Chainrings: Double Pedal Spindle : 9/16" Crank Intended Use: Road Chainline/Hub Compatibility :130 Hubs Spindle Interface Type: Shimano Hollowtech II Drivetrain Speeds: 12