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 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. SPECIFICATIONS Color: Black Largest Cog: 36 Rear Derailleur Mount Type: 10x1 Standard , Shimano Rear Direct Mount Chain Wrap Capacity (teeth): 40 Cage Length: Long Rear Der/Shifter Compatibility: Shimano Road Di2 Drivetrain Speeds: 12