Shimano Dura-Ace FC-R9200 Crankset - 167.5mm 12-Speed 50/34t Hollowtech II Spindle Interface BLKShimano Dura Ace FC R9200 Crankset 167. 5mm 12 Speed 50 34t Hollowtech II Spindle Interface Black. 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 Shimanos class leading chainring designs the FC R9200 wont let you down. Optimal balance of stiffness strength