Description
Shimano GRX RD-RX825 Di2 Rear Derailleur – 12-Speed Long Cage With Clutch For 2x Black. 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 the 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 allow a compact design
- Offers fast and reliable shifting on rough terrain
- Adjustable chain stabilizer prevents chain slap
- Shimano Shadow RD offers a quieter drivetrain by utilizing a stabilizer 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 more easily identify battery life, pairing, adjust mode, etc.
- Top sprocket: Max. 11t / Min. 11t
- Low sprocket: Max. 36t / Min. 34t
- Total Capacity: 40t
Details
| Largest Cog | 36 |
| Rear Der/Shifter Compatibility | Shimano Road Di2 |
| Rear Derailleur Mount Type | 10×1 Standard |
| Rear Derailleur Mount Type | Shimano Rear Direct Mount |
| Drivetrain Speeds | 12 |
| Chain Wrap Capacity (teeth) | 40 |
| Cage Length | Long |
| Color | Black |
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