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Equipment > Components > Derailleurs > Gravel - Rear


The GRX Di2 12-speed rear derailleur from Shimano incorporates a wireless connectivity unit and charging port within its design, guaranteeing swift and dependable gear changes for mixed-terrain adventures while facilitating effortless recharging. Equipped with Shadow RD+ technology, it effectively minimizes chain slap and maintains accurate shifting across rough terrain. With its convenient built-in ON/OFF switch, wheel removal becomes a hassle-free task. Compatible with 11-34T and 11-36T 12-speed cassettes, the RD-RX825 supports both Full and Semi-Synchronized shift modes, offering riders enhanced customization options to suit their preferences.

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  • 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
  • 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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