Specifications:

• Application: Road, Cyclocross
• Compatibility: Shimano 2x11-speed
• Chainring Mount: 110 mm bolt circle diameter, 4-arm asymmetrical

Technical Information:

• Series: Ultegra R8000
• Crankarm Material: aluminum 
• Chainring Material: aluminum / CFRP, aluminum (aluminum only with 36-46)
• Axle Material: steel
• Graduation: 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 mm
• Axle Diameter: 24 mm (Hollowtech II)
• Compatible B.S.A. Bottom Bracket Shell Width: 68 mm
• Recommended Bottom Bracket: SM-BBR60 or SM-BB72-41B Pressfit Hollowtech II (not included)
• Recommended Chain: HG-EV 11-speed, HG-X11 (e. g. CN-HG701-11)
• optimized lightweight crankarm design produces excellent power transfer efficiency
• redesigned chainring tooth profiling increases clearance between chain and leading teeth to provide compatibility with frames featuring 135 mm O.L.D. and 410 mm chainstay length
• anodized crankarms and chainrings
• chainring bolts made of aluminum 

Technology:

Hollowtech

A lightweight crankset reduces the weight of the bike and decreases rotating mass to aid in acceleration. The challenge is to minimize the importance of the crank without reducing its strength and rigidity. Shimano’s advanced forging technology has solved the problem robust the Hollowtech crank. Like the high-quality frame tubing, a hollow crank arm can provide fantastic strength and rigidity at the meager weight. 

Hollowtech II

The concept of Hollowtech II technology is focused on producing a superior crankset, which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency. In contrast, its weight, a vital element of the crankset, you want light, aids in cycling longer distances over which the rider needs to drive more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. 

Outboard Bearings: For most frames with 68 mm bottom bracket shells, Hollowtech II with a 24 mm axle can set the bearing position outside of the frame to provide better weight distribution and more stability.

High Precision Sealing: Hollowtech II cranksets have a high-precision sealing in the bearing area to increase durability, maintaining the excellent rotating performance for long periods.

Hollowglide

Profoundly rigidity hollow structure cuts down on weight yet maintains strength. Better power transfer and more precise front shifting.

Factory Numbers:

165.0 mm 34-50: I-FCR8000AX04

165.0 mm 39-53: I-FCR8000AX39

170.0 mm 34-50: I-FCR8000CX04

170.0 mm 36-46: I-FCR8000CX66

170.0 mm 36-52: I-FCR8000CX26

170.0 mm 39-53: I-FCR8000CX39

172.5 mm 34-50: I-FCR8000DX04

172.5 mm 36-46: I-FCR8000DX66

172.5 mm 36-52: I-FCR8000DX26

172.5 mm 39-53: I-FCR8000DX39

175.0 mm 34-50: I-FCR8000EX04

175.0 mm 36-46: I-FCR8000EX66

175.0 mm 36-52: I-FCR8000EX26

175.0 mm 39-53: I-FCR8000EX39

Contents:

- 1 x Shimano Ultegra FC-R8000 crankset

- 1 x Shimano crank bolt

- bottom bracket not included

Gewicht:

-anthracite / 170.0 mm 34-50 : 674 g (ohne Innenlager)

-anthracite / 170.0 mm 36-46 : 668 g (ohne Innenlager)

-anthracite / 170.0 mm 36-52 : 681 g (ohne Innenlager)

-anthracite / 170.0 mm 39-53 : 690 g (ohne Innenlager)