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. 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. 54-40t option is designed for the fast racing situations. 148mm Q-factor. 44.5mm chainline.