Shimano GRX RD-RX825 12-Speed Di2 Rear Derailleur

Shimano GRX RD-RX825 12-Speed Di2 Rear Derailleur

The Shimano GRX RD-RX825 12-Speed Di2 Rear Derailleur is a wireless rear derailleur that brings reliable and smooth shifting to your GRX drivetrain. Using Shimano’s Di2 technology, you can customize shift controls and charge your Di2 system with an easy to access port. Made to be dependable on mixed terrain, this rear derailleur features SHADOW RD+ and a stabilizer switch. Both of these features help ensure reliable shifting on rough surfaces. SHADOW RD+ minimizes chain slap and noise from your drivetrain while the stabilizer switch provides additional chain tension for bumpy and rough terrain. In addition, the stabilizer switch can easily be moved between ON and OFF based on the type of surface you are riding on. This derailleur uses sealed bearings for extra protection against the elements and is offered in a single derailleur cage length. It works with 11-34T and 11-36T cassettes.

Technology

Shimano’s SHADOW RD+
SHADOW RD+ helps minimize drivetrain noise while improving shift quality on rough terrain. The chain stabilizer system helps improve chain tension so you can shift gears regardless of terrain.

Stabilizer Switch
Easily move this switch ON or OFF based on your terrain. For rough surfaces, turn the stabilizer ON to keep shifting crisp and reduce the chances of damaging your derailleur.

Shimano Di2 Wireless Shifting
Bring wireless shifting and customization to your GRX 12-speed drivetrain.

Other Versions to Consider

Shimano GRX RX820 Mechanical 12-Speed Rear Derailleur: We also carry the non-Di2 Shimano GRX RD-RX820 12-Speed Rear Derailleur.