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
