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Shimano GRX 12SPD Rear Derailleur-RD-RX825

Shimano GRX 12SPD Rear Derailleur-RD-RX825

Regular price HK$2,187.00
Regular price Sale price HK$2,187.00
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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.
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 36T/Min. 34T
  • Total capacity: 40T
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