The Shimano GRX Di2 RD-RX825 2x12-speed rear derailleur ensures quiet and precise shifting even on the rough surfaces typically found on gravel thanks to the integrated chain stabilizer. The stabilizer can be deactivated at any time using the ON/OFF switch, so nothing stands in the way of long rides on smooth asphalt.
Due to its compatibility with sprockets up to 36 teeth, the RD-RX825 gravel bike rear derailleur is also suitable for the toughest climbs.
The gravel-specific 2x12 option provides a closer gradation of the rear cassette, ideal for subtle cadence changes during competitions and fast weekend rides in the group.

- Adjustable chain stabilizer prevents the chain from hitting or jumping off
- Smooth and reliable shifting on changing ground conditions
- Compact design with integrated unit for wireless signal transmission, charger and switch
- LED status indicator (battery indicator, pairing, setting mode, etc.)
- Battery indicator
- Compatible chain: 12-speed HG
- Total capacity: 40 teeth
- max. largest pinion: 36 teeth
- min. largest pinion: 34 teeth
- max. smallest pinion: 11 teeth
- min. smallest pinion: 11 teeth
- Mounting: direct mounting
- Version: 12-speed
- Di2 wireless chip: Yes
- Weight according to manufacturer: 310g

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