The Shimano GRX RD-RX825 Di2 Rear Derailleur provides fast, reliable 12-speed shifting across varied terrain. It features a compact design with an integrated wireless unit, charging port, and switch for streamlined operation. This derailleur is built for gravel use, ensuring consistent performance for serious cyclists.

An adjustable chain stabilizer and SHIMANO SHADOW RD+ technology prevent chain slap, enhancing stability. The gravel-tuned clutch tension can be switched ON for rough terrain or OFF for smoother roads. An LED status indicator provides quick visual feedback on battery life and system status.

Quick Facts

Feature	Specification
Drivetrain Speeds	12-Speed
Max Low Sprocket	36T
Total Capacity	40T
Compatibility	Shimano Road Di2 12-speed systems; 11-34T to 11-36T cassettes
Mount Type	Direct Attachment
Claimed Weight	310g