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.

• Compact design with integrated wireless unit, charging port, and switch
  
• Fast and reliable shifting on rough terrain
  
• Adjustable chain stabilizer prevents chain slap
  
• Gravel-tuned clutch tension
  
• Switch stabilizer ON/OFF to match terrain: ON for gravel, OFF for smooth roads
  
• LED status indicator
  
• Battery indicator, pairing, adjust mode, etc.

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