Shimano GRX Di2 RD-RX825 Rear Derailleur

Shimano's GRX 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.

Features:

• 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
• LED status indicator
• Battery indicator, pairing, adjust mode, etc.

Specifications:

• Max Front Difference: 17T
• Maximum Cog: 36T
• Minimum Cog: 11T
• Cage: GS
• RD Capacity: 40T
• RD Spring Type: Shadow Plus
• Speed: 12