Shimano GRX RD-RX825 Di2 Rear Derailleur - 12-Speed, Long Cage, With Clutch, For 2x, Black

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Product details

Management number	203350831	Release Date	2025/09/26	List Price	$222.50	Model Number	203350831
Category	Parts Shifting Derailleurs

Shimano's GRX RX825 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.

Integrated wireless unit, charging port, and switch allows a compact design
Offers fast and reliable shifting on rough terrain
Adjustable chain stabilizer prevents chain slap
Shimano Shadow RD+ offers a quiter drivetrain by utilizes a stablizer to reduce chain slap and provides a simple solution for chain drops
Gravel-tuned clutch tension features a switch stabilizer ON/OFF to match terrain - ON for gravel, OFF for smooth roads
LED status indicator to easier identify battery life, pairing, adjust mode, etc.
Top sprocket: Max. 11t/Min. 11t
Low sprocket: Max. 36t/Min. 34t
Total Capacity: 40t