Shimano Ultegra FC-08 Crankset - 172.5mm | 50/34t

Specifications

• MPN: FC-R8000
• Series: Shimano Ultegra R8000
• Speed: 2x11-speed
• Construction: Hollowtech II
• Crank arm length: 172.5mm
• Chainrings: 50/34T compact (included)
• Bolt circle diameter: 110mm, 4-arm
• Q-factor: 146mm
• Chain line: 43.5mm
• Spindle: 24mm steel
• Compatible chain: HG-EV 11-speed, HG-X11
• Recommended bottom bracket: Shimano SM-BBR60 or SM-BBR60-PB (sold separately)
• Approx weight: 674g (50/34T)
• Color: Black
• Warranty: 2 years
• Includes: Crank arms with 50/34T chainrings and fixing bolt, no bottom bracket

FAQ

Does the FC-R8000 come with chainrings?

Yes. This crankset ships with 50/34T compact chainrings already fitted, so it is a complete crank and chainring set. A bottom bracket is not included and is sold separately.

What bottom bracket does it use?

It uses a Hollowtech II external bottom bracket with a 24mm spindle. Shimano recommends the SM-BBR60 threaded or SM-BBR60-PB press-fit bottom bracket depending on your frame's shell.

Which drivetrains is it compatible with?

It is a 2x11-speed road crank that runs HG-EV and HG-X11 11-speed chains and works across the mechanical Ultegra R8000, 105, and Dura-Ace road families. For best front shifting, Shimano pairs it with the FD-R8000 front derailleur.

What does the 50/34T gearing give me?

The 50/34T compact setup pairs a 50-tooth big ring for a solid top-end on flats and descents with a 34-tooth small ring that makes climbing easier, especially with a wide-range cassette. It is the most climbing-friendly of the R8000 chainring options.

Best For

Riders building or refreshing an 11-speed mechanical road drivetrain who want reliable Ultegra-level stiffness and power transfer, and anyone replacing a worn crank on a 105, Ultegra, or Dura-Ace 11-speed bike. The 50/34T compact gearing suits climbers, all-rounders, and endurance riders who value an easier low gear.