The Shimano Ultegra Di2 RD-R8150 12-Speed Rear Derailleur delivers fast, precise and effortless electronic shifting for modern performance road bikes. Built with Shimano’s advanced Di2 E-Tube technology and low-profile Shadow design, this rear mech offers smooth gear changes, wireless cockpit connectivity and race-ready reliability for serious road cyclists.
- Shimano Ultegra Di2 RD-R8150 rear derailleur
- 12-speed E-Tube Di2 electronic shifting compatibility
- Fast, precise and effortless gear changes
- Rear derailleur acts as the system charging point and wireless control hub
- Wireless connectivity to compatible Di2 shifters
- ANT+ connection for compatible third-party devices
- Replaces the traditional handlebar junction for a cleaner cockpit
- Button and LED indicator for Di2 operations and settings
- LED displays synchronized shift mode, setting mode and charge requirements
- Low-profile Shadow design reduces crash damage risk
- Programmed automatic derailleur motion for smooth shifting
- Eliminates poor shifting caused by cable stretch, corrosion and contamination
- Built-in saver function helps protect internal structure from impacts
- Cold-forged aluminium link plates and body for low weight and durability
- Four fluorine-coated self-lubricating pivot bushings reduce friction
- Compatible with wide gear ratios up to 11-34T
As the central brain of the latest Ultegra Di2 system, the RD-R8150 rear derailleur provides wireless communication with the shifters, charging access for the system and ANT+ connectivity for compatible third-party devices. It also replaces the traditional handlebar junction, helping create a cleaner, more integrated road bike setup.
Shifting is quick, smooth and accurate at the light touch of a button, eliminating the stretch, contamination and corrosion issues associated with mechanical cables. The derailleur’s programmed automatic motion delivers consistent performance across every gear change, while the button and LED indicator allow easy access to Di2 operations, shift modes, settings and charge status.
The sleek Shadow profile reduces the risk of damage in a crash, while a built-in saver function helps protect the internal structure from strong impacts. High-tolerance cold-forged aluminium link plates and body construction keep the derailleur lightweight and durable, and four self-lubricating fluorine-coated pivot bushings provide low-friction shifting performance.
Compatible with 12-speed Shimano E-Tube Di2 systems and wide gear ratios up to 11-34T, the Shimano Ultegra Di2 RD-R8150 Rear Derailleur is the ideal choice for riders looking for pro-level electronic shifting with dependable everyday performance.