GRX RD-RX825-DI2 – (11-36T) Rear Derailleur – 2×12

SHIMANO’s GRX Di2 12-speed rear derailleur features a built-in wireless connectivity unit and charging port, ensuring fast and reliable shifting for mixed-terrain riding and easy recharging. Integrated SHADOW RD+ technology prevents chain slap and ensures precise shifting even on rough terrain. Thanks to built-in ON/OFF switch, wheel removal is easy too. The RD-RX825 is compatible with 11-34T and 11-36T 12-speed cassettes and supports Full or Semi-Synchronized shift modes, enhancing rider customization.

BENEFIT

Compact design with integrated wireless unit, charging port, and switch

BENEFIT

Fast and reliable shifting on rough terrain

FEATURE

Adjustable chain stabilizer prevents chain slap

FEATURE

SHIMANO SHADOW RD+

BENEFIT

Gravel-tuned clutch tension

FEATURE

Switch stabilizer ON/OFF to match terrain: ON for gravel, OFF for smooth roads

BENEFIT

LED status indicator

FEATURE

Battery indicator, pairing, adjust mode, etc.

BENEFIT

Top sprocket: Max. 11T/Min. 11T

BENEFIT

Low sprocket: Max. 36T/Min. 34T

BENEFIT

Total capacity: 40T