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. 148mm Q-factor. 44.5mm chainline. 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.