Shimano GRX RD-RX825 Rear Derailleur (Black) (12-Speed) (Shadow Plus) (Electronic)

Shimano GRX RD-RX825 Rear Derailleur (Black) (12-Speed)
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Price: $409.99

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Shimano GRX RD-RX825 Rear Derailleur Description:

Shimano GRX 12-speed Rear Derailleur ensures quick and precise shifting for mixed-terrain riding with a built-in switch for chain management in off-road and on-road conditions. Easy charging via the integrated port for on-the-bike recharge. Fully customizable with an array of shift mode options and a status indicator light to ensure your next adventure is ready to go.


  • Integrated D-FLY connectivity and charging port
  • Fast and reliable shifting over rough terrain
  • Adjustable chain stabilizer prevents chain slap and smooth shifting when hitting pavement sections
  • Gravel-tuned clutch adds just the right amount of tension for chain management
  • LED status indicator calls out battery life with a quick glance
  • Compatible with 11-34 and 11-36T cassettes


  • Speed: 12 Speed
  • Shifter Compatibility: Shimano Di2
  • Shift Mechanism: Electronic (Wireless/Wired)
  • Max. Tooth: 36T
  • Min. Tooth: 11T
  • Chain Wrap Capacity: 40T
  • Cage Material: Aluminum
  • Chain Retention: Shadow RD+
  • Color: Black
  • Weight: 310g

This product was added to our catalog on May 23, 2024