Shimano Ultegra Hollowtech II FC-R8000 Front Chainwheel 2x11 Speed

Shimano Ultegra Hollowtech II FC-R8000 Front Chainwheel 2x11 Speed

Shimano Ultegra - Hollowtech II - Road Crankset - 2x11-speed

The Perfect Road Crankset: Upgrade your road bike with the all-new Shimano Ultegra Hollowtech II FC-R8000 Front Chainwheel, a high-performance 2x11-speed crankset designed to take your cycling to the next level.

Lightweight and Stiff Hollowtech II Design: The FC-R8000 features lightweight and stiff Hollowtech II crankarms, ensuring efficient power transfer with every pedal stroke. Experience improved acceleration and responsiveness on your rides.

Hollow Outer Chainring for Optimal Performance: Equipped with a hollow outer chainring, this crankset reduces weight while maintaining durability and performance. It efficiently transfers power from the crankset to the chain for smooth and reliable shifting.

Wider Gear Pitch for Modern Road Frames: The FC-R8000 comes with a wider gear pitch, providing increased clearance on modern road frames. Enjoy compatibility with a wide range of bike configurations, ensuring a perfect fit and smooth operation.

Multiple Chainring and Crank Arm Length Options: Choose from a variety of chainring options: 53-39, 52-36, 50-34, and 46-36T, allowing you to fine-tune your gear ratios to suit your riding style and terrain. Additionally, select the crank arm length that best fits your needs: 165, 170, 172.5, or 175mm.

Features

Features of Shimano Ultegra Hollowtech II FC-R8000 Front Chainwheel 2x11 Speed

Lightweight Crankarm Design for Efficient Power Transfer: Every pedal stroke is translated into forward motion, making your rides more efficient and enjoyable.

Minimal Weight with Maintained Stiffness: The balance between minimal weight and stiffness ensures optimal performance on the road.

Hollowtech II Technology for Enhanced Strength: Equipped with Hollowtech II technology, this chainwheel exhibits increased strength and rigidity, enhancing its overall durability and longevity.

Rider-Tuned Gear Performance: The FC-R8000 front chainwheel provides rider-tuned gear performance through various gear combinations, allowing you to find the perfect setup for your riding style and terrain.

Redesigned FC for Enhanced Frame Compatibility: It can be seamlessly integrated into a wider range of bike frames, ensuring a perfect fit and performance.

Wider Gear Pitch for Increased Clearance: The chainwheel's wider gear pitch increases the clearance between the chain and leading teeth. This enhancement provides compatibility with frames of O.L.D. (Over Locknut Dimension) 135 mm and chainstay length of 410 mm, accommodating a variety of bike configurations.

Specifications

Specifications of Shimano Ultegra Hollowtech II FC-R8000 Front Chainwheel 2x11 Speed

Model No	FC-R8000
Series	Ultegra R8000 Series
Color	Series Color
Average Weight	668 (46-36T), 674 (50-34T), 681 (52-36T), 690 (53-39T)
Rear Speeds	11
Compatible Chain	Linkglide, HG 11-speed
Chain Line (mm)	43.5
P.C.D. Left / Right (mm)	110
P.C.D. (mm)	110
Spider/Gear Arms	4
Chainring Combination	46-36T, 50-34T, 52-36T, 53-39T
Q-Factor (mm)	146
Crank Arm Length (mm)|165	Yes
Crank Arm Length (mm)|170	Yes
Crank Arm Length (mm)|172.5	Yes
Crank Arm Length (mm)|175	Yes
Optional Chain Guard|Without Chain/Bash Guard	Yes
Hollowtech II	Yes
Hollowtech Crank Arm	Yes
Hollowglide	X - (46-36T)
Compatible Bottom Bracket Type|Outboard	Yes
Recommended Bottom Bracket|Threaded (Normal)	SM-BBR60
Recommended Bottom Bracket|Press-Fit	SM-BB72-41B
Threaded Bottom Bracket Shell Width (mm)|68	Yes
Threaded Bottom Bracket Shell Width (mm)|70	Yes
Crank Fixing Screw Included	Yes

Technologies

Technologies of Shimano Ultegra Hollowtech II FC-R8000 Front Chainwheel 2x11 Speed

HG-EV:

HG-EV: HG-EV cassette is for rider-tuned gear combination & cadence management. We provide optimal 11-speed drivetrain gear ratio; you can choice wider and closer gear combination available to match various riding disciplines. HG-EV cassette is obtained 11-speed gear without compromising the 10-speed durability and improved Hyperglide shifting.

Hollowglide:

Hollow technology on outer chainring

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

Hollowtech:

Hollowtech Crank Arm

Hollow Forged Crank Arms

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 lightweight. 

HG-X11:

Silky driving, accurate shifting

HG-X11 directional chain realize more smoother shifts and greater overall performance.

Right and left sides are optimized for front and rear shifting respectively.

Hollowtech II:

Providing the best balance of stiffness, strength, weight and rotating performance
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 while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank.

Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own proprietary forging technology that also maintains rigidity. The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.

The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.

High Precision Sealing

Moreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.

24mm Diameter Axle And Bearings

Why choose the 24mm axle and bearings for the Hollowtech II crankset?

The diameter of the Bottom Bracket axle and bearings was of primary importance for the development because the Bottom Bracket axle area is tied to such key elements as stiffness, strength, weight and rotating performance.

What’s important is the total balance of crankset

In addition, taking the crankset as a whole, the total balance of crankarm rigidity, axle stiffness, bearing position and others is essential.

Indeed, the crankset is designed by careful consideration of the total balance of those elements to prevent breakage.

Outboard Bearing

For most frames with 68mm Bottom Bracket shells, Hollowtech II with 24mm axle can set the bearing position outside of the frame to provide better weight distribution and more stability.

24mm Diameter Axle And Bearings Provide Optimum Balance For The Crankset

After studying all these problems thoroughly, we made the decision to adopt the 24mm diameter axle and bearings, which have the optimum balance, for the Hollowtech II crankset.

In addition, an examination of the total crankset, including the crankarm and gears, proves the optimum balance of rigidity, weight and rotating performance for the ultimate transfer of power to your bike. Hollowtech II is simply the most optimized crankset design on the market.