Rear Derailleur Shimano Ultegra Di2 RD-R8150 12-speed 03014336

Experience a new level of precision and speed with the Shimano ULTEGRA Di2 RD-R8150 – a 12-speed rear derailleur with Direct Mount installation. Designed for serious road cyclists, this electronic derailleur delivers lightning-fast and accurate shifting thanks to e-shifting technology and Shimano's wireless integration.

Compatible with the 12-speed Ultegra Di2 system, the derailleur supports cassettes up to 34T and uses a single cage length for simpler setup and broader compatibility. The compact Shadow RD profile reduces the risk of impacts and improves aerodynamics, while the built-in wireless module, charging port, and mode button keep the design clean and functional.

Customization is fully possible through the E-Tube Project app – you can adjust shift speed, activate Synchro or Semi-Synchro modes, and reassign buttons according to your preferences. Whether racing or riding for pleasure, this derailleur offers control, reliability, and top performance.

Key features:

12-speed compatibility

Mounting: Direct Mount (hanger sold separately)

Supported cassettes: 11–30T / 11–34T

Single cage length for easy maintenance

Built-in wireless connectivity and E-Tube integration

Shadow RD design for a lower profile and protection

Customizable via E-Tube Project

Technical specifications:
Mount type: Direct Mount
Speeds: 12
Compatible chain: Shimano HG 12-speed
Max large sprocket: 34T
Min large sprocket: 30T
Min small sprocket: 11T
Total capacity: 33T
Cable compatibility: EW-SD300
Built-in wireless module and mode button
Materials: Aluminum / CFRP composite

Upgrade your drivetrain with the Shimano RD-R8150 and enjoy smooth, powerful, and intelligent electronic shifting designed for modern road cycling.