Shimano Ultegra R8000 11 Speed Crankset

The all-new Shimano Ultegra R8000 series crank features lightweight crankarms, a hollow outer chainring, and a wider gear pitch for increased clearance on modern road frames. It is available with 53-39, 52-36, 50-34, and 46-36T chainrings and 165, 170, 172.5, and 175mm crank arm lengths.

Technologies

HollowTech II - The concept of HollowTech II technology is focused on producing a superior crankset which will maximise a riders 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. 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.

HG-EV - HG-EV cassette sprocket 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 sprocket 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 - Hollow forged crank arms. A lightweight crankset not only reduces the bikes 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. Shimanos 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.

Features

Minimal weight without sacrificing stiffness
Wider gear pitch increases clearance between chain and leading teeth, providing compatibility with frames of O.L.D. 135 mm and 410 mm chainstay length
Lightweight crankarm design optimized for power-transfer efficiency
Rider-tuned gear performance through various gear combinations
Redesigned FC for greater frame compatibility

Specifications

Average weight690 g (53-39T), 681 g (52-36T), 674 g (50-34T), 668 g (46-36T)HollowTech II TechnologyYesThreaded BB shell width 70mmYesChain line (mm)43.5Chain ring combination50-34T, 52-36T, 53-39T, 46-36TCompatible BB type - OutboardYesCompatible BB typeOutboardCompatible chainHG-EV 11-speed, HG-X11Crank Arm Length165 mm, 170 mm, 172.5 mm, 175 mmCrank fixing bolt includedYesCrank arm length (mm) - 165.0YesCrank arm length (mm) - 170.0YesCrank arm length (mm) - 172.5YesCrank arm length (mm) - 175.0YesGear arms4HollowGlideX (46-36T)HollowTech TechnologyYesOptional chain guard - Without chain / bash guardYesOptional Chain GuardWithout chain guardP.C.D. (mm)110Rear speeds11Recommended BB - PressfitSM-BBR60-PBRecommended BB - Threaded (normal)SM-BBR60TechnologyHollowTech BB, HollowTech IIThreaded BB shell width - 68mmYesThreaded BB Shell Width68 mm, 70 mmIncludes Crank Arm Fixing BoltYesQ-factor (mm)146