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General| Series | ULTEGRA |
|---|---|
| Model | FC-R8000 |
| Material | Aluminum |
| Crank Construction | Hollowtech II |
| Crank Arm Lengths | 165mm, 170mm, 172.5mm, 175mm |
| Chainrings | 2 |
| Bolt Circle Diameter | 110mm |
| Chainline | 43.5mm |
| Compatibility | 11-speed |
| Chainring Options | 52-36T, 53-39T |
| Compatible BB Type | Hollowtech II |
Critical warnings for installation and operation, emphasizing potential serious injury.
Cautions for preventing personal injury or equipment damage during use.
Important operational notices and maintenance tips for safe use.
Guidance on bicycle installation, maintenance, and chain compatibility.
Specific tool combinations for BB-R9100 installation.
Specific tool combinations for SM-BBR60 installation.
Required tools for SM-BB92-41B/SM-BB72-41B.
Procedures and tool combinations for threaded bottom bracket setup.
Steps for installing and removing PRESS-FIT bottom bracket cups.
Step-by-step guide for installing the crank arm assembly.
Instructions for correctly replacing chainrings on the crankset.
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