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Shimano Ultegra crankset FC-6800 - innovative 4-arm-design
The Shimano 11-speed crankset Ultegra FC-6800 features the innovative 4-arm design, in which numerous 2x gradations can be mounted on a uniform 110 mm bolt circle diameter. This structure provides more stiffness and optimised power transmission at the same time. The FC-6800 crank has hollow forged aluminium arms (Hollowtech) and a hollow outer chainring (Hollowglide) to save weight. Of course, the proven Hollowtech II technology with 24 mm axle is used, which stands for an optimal ratio of strength and weight.
Application: Road, Cyclocross
Compatibility: Shimano 2x11-speed
Chainring Mount: 110 mm pitch circle, 4-arm asymmetrical
Series: Ultegra 6800
Crankarm Material: aluminium
Chainring Material: aluminium, carbon (CFRP) / aluminium
Axle Material: steel
Gradation: 34-50, 36-46, 36-52, 39-53
Crankarm Length: 165.0 mm, 170.0 mm, 172.5 mm, 175.0 mm
Chainline: 43.5 mm
Q-Factor: 146.6 mm
Axle Diameter: 24 mm
Compatible BSA Shell Width: 68 mm
Recommended Bottom Bracket: SM-BBR60 or SM-BB72-41B Pressfit Hollowtech II (not incl.)
Recommended Chain: HG-EV 11-speed, HG-X11 (e.g. CN-HG701-11)
- optimised power transfer
- Dura Ace proven 4-arm design: stiffer and lighter
- same bolt circle: all available chainring gradations can be mounted on one and the same crank
- rider tuned: wide range of ratios
- highly efficient due to low weight
- in combination with FD-6800 the risk of the chain drop is further reduced
- anodised crankarms and chainrings
- aluminium chainring bolts
A lightweight crankset not only reduces the bike's weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. Shimano's advanced forging technology has solved the problem through the Hollowtech crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very light weight.
What matters is the overall balance of the crankset. With regard to the entire crankset, an optimum ratio between the strength of the crank arms, the stiffness of the axle, the bearing position and other features is very important. During the development of the crankset, the overall balance of all individual elements was carefully considered in order to ensure maximum stability.
Outer bearing: On most 68 mm bottom bracket housings, the Hollowtech II 24 mm axle can be mounted outside the frame for better weight distribution and stability.
High-quality precision seals: The Hollowtech II set also features high quality precision seals in the bearing area to extend durability and maintain excellent rotation efficiency over time.
The axle and the 24 mm diameter bearings ensure optimum balance of the crankset and optimum transmission of power to the bicycle.
Hollow outer chainring: The extremely stiff hollow structure reduces the weight while maintaining the same strength. Better power transmission and faster, more precise front shifts (not with 46 tooth).
Manufacturer Part Numbers:
170.0 mm 34-50: I-FC6800CX04
172.5 mm 34-50: I-FC6800DX04
175.0 mm 34-50: I-FC6800EX04
170.0 mm 36-46: I-FC6800CX66
175.0 mm 39-53: I-FC6800EX39
165.0 mm 34-50: I-FC6800AX04 sold-out
172.5 mm 36-46: I-FC6800DX66 sold-out
175.0 mm 36-46: I-FC6800EX66 sold-out
170.0 mm 36-52: I-FC6800CX26 sold-out
172.5 mm 36-52: I-FC6800DX26 sold-out
175.0 mm 36-52: I-FC6800EX26 sold-out
165.0 mm 39-53: I-FC6800AX39 sold-out
170.0 mm 39-53: I-FC6800CX39 sold-out
172.5 mm 39-53: I-FC6800DX39 sold-out
- 1 x Shimano Ultegra FC-6800 crankset
- 1 x Shimano crank bolt
- not incl. bottom bracket
- grey/170.0 mm 36-46: 671 g (ohne Innenlager)