The Shimano Dura-Ace FC-09 is Shimano's flagship 11-speed road crankset, engineered for elite riders who demand maximum power transfer and front-shifting precision. The 54/40T chainring combination is built for high-speed road racing and criterium efforts where a larger top gear is essential, delivered on 170mm crank arms that suit a wide range of road and triathlon riders.

Highlights

• HOLLOWTECH II crank arms: Hollow-forged aluminium construction delivers exceptional stiffness-to-weight ratio, converting every watt of pedalling effort directly into forward motion.
• HOLLOWGLIDE chainrings: Partially hollow outer chainring reduces rotating mass while maintaining the stiffness of a 130mm BCD ring — sharp, reliable front shifts under load.
• 54/40T chainring pairing: Purpose-built for high-speed racing on flat and rolling terrain, offering a wide usable gear range across an 11-speed rear cassette.
• Asymmetric 4-arm spider: Positions structural reinforcement exactly where pedalling forces are greatest, maximising stiffness without unnecessary weight.
• 110mm asymmetric BCD: Same bolt circle diameter across all FC-09 chainring sizes — one crank arm fits all chainring combinations.
• 24mm HOLLOWTECH II spindle: Integrated hardened steel spindle in the drive-side arm eliminates the crank-spindle junction, ensuring torsional rigidity under sprint loads.
• 2×11-speed compatibility: Designed for Shimano Dura-Ace and compatible 11-speed mechanical and electronic (Di2) road drivetrains.

HOLLOWTECH II & HOLLOWGLIDE Technology

Shimano's HOLLOWTECH II system integrates a 24mm hardened steel spindle directly into the drive-side crank arm. By eliminating the traditional spindle-to-crank joint, flex is removed from the equation — power travels from pedal stroke to chain without loss. The HOLLOWGLIDE chainring design applies a partially hollow cross-section to the outer ring, reducing rotating mass while matching the stiffness that riders expect from larger-diameter chainrings. Together these technologies define the standard for road racing cranksets at the elite level.

54/40T — Built for Speed

The 54/40T chainring combination is the performance choice for riders who regularly spin out smaller chainrings on fast descents, in pacelines, or during criterium efforts. Paired with an 11-speed cassette, the 54T provides a high top gear for high-cadence sprinting and sustained flat-road speed, while the 40T inner ring ensures a usable gear on rolling terrain without an extreme jump between rings. This configuration is used by WorldTour-level road racers who prioritise top-end speed over low-end climbing range.

Compatibility & Fit

Designed for Shimano 11-speed road drivetrains — compatible with Dura-Ace, Ultegra, and 105 11-speed front derailleurs, and with HG-EV and HG-X11 11-speed chains. Crank arm length: 170mm. Spindle diameter: 24mm (HOLLOWTECH II). Chainring BCD: 110mm asymmetric. Requires a Shimano HOLLOWTECH II-compatible bottom bracket (not included); recommended BB-R9100 for 68mm or 70mm threaded bottom bracket shells. Also compatible with press-fit HOLLOWTECH II bottom brackets (e.g. SM-BB92-41B for BB86 shells).