Description
Shimano Ultegra R8000 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.
Key Features:
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Lightweight Crankarm Design: Optimized for power-transfer efficiency.
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Minimal Weight, Maximum Stiffness: Achieves weight reduction without sacrificing rigidity.
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HOLLOWTECH II: Provides the best balance of stiffness, strength, weight, and rotating performance.
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Rider-Tuned Gear Performance: Available in various gear combinations to suit different riding disciplines.
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Greater Frame Compatibility: Redesigned for improved compatibility with modern road frames.
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Wider Gear Pitch: Increases chain and leading tooth clearance, ensuring compatibility with frames of O.L.D. 135 mm and chainstay lengths of 410 mm.
Technology:
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HG-EV: Rider-tuned gear combinations and cadence management through the HG-EV cassette sprocket, providing optimal 11-speed drivetrain gear ratio without compromising the durability of 10-speed.
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HOLLOWGLIDE: Hollow technology applied to the outer chainring for enhanced rigidity and reduced weight. It results in better power transfer and quicker, more precise front shifting.
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HG-X11: A directional chain technology for smoother shifting and superior performance. Optimized for both front and rear shifting, with dedicated right and left side performance.
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HOLLOWTECH Crank Arm: Lightweight, hollow crankarm structure reduces the bike’s weight and rotating mass, enhancing acceleration without reducing strength or rigidity.
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HOLLOWTECH II: Advanced crankset design focused on stiffness and weight balance for improved power transfer. It integrates the bottom bracket axle with the right crankarm, leading to better weight distribution and pedaling stability.
Specification
| Compatible Chain |
HG-EV 11-speed / HG-X11 |
| P.C.D. left / right (mm) |
110 |
| Chainring Combinations |
50-34T, 52-36T, 53-39T, 46-36T |
| Crank Arm Length (mm) |
165, 170, 172.5, 175 |
| Optional Chain Guard |
Without chain guard |
| Compatible BB Type |
Outboard |
| Recommended BB |
Threaded (normal): SM-BBR60, Pressfit: SM-BBR60-PB |
| Threaded BB Shell Width (mm) |
68, 70 |
| Crank Arm Material |
Aluminum (Anodized Finish) |
| Crank Axle Material |
Steel (Plated Finish) |
| Outer Ring Material |
Aluminum/CFRP (Anodized Finish) |
| Inner Ring Material |
Aluminum (Anodized Finish) |
| Crank Fixing Bolt Included |
Yes |
| Average Weight (170 mm, w/o BB) |
690 g (53-39T), 681 g (52-36T), 674 g (50-34T), 668 g (46-36T) |
Why Choose the HOLLOWTECH II Crankset?
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24mm Axle & Bearings: Provides the optimal balance between crankset stiffness, strength, weight, and rotating performance.
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Outboard Bearings: Allows better weight distribution and increased stability on frames with a 68 mm bottom bracket shell.
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Total Crankset Balance: The crankset is meticulously engineered to balance crankarm rigidity, axle stiffness, and bearing position to ensure efficient power transfer and prevent breakage.
