The Shimano GRX DI2 RD-RX825 Rear Derailleur is a high-performance, 12-speed component designed for mixed-terrain riding. Featuring built-in wireless connectivity, a charging port, and SHADOW RD+ technology, this rear derailleur ensures fast and reliable shifting on rough terrain, making it ideal for gravel and mixed-surface adventures.

Key Features:
  • Built-In Wireless Connectivity: Allows for seamless integration with electronic shifting systems and easy recharging for enhanced performance
  • Fast and Reliable Shifting: Ensures precise shifting even on rough terrain, providing a smooth and efficient riding experience
  • Adjustable Chain Stabilizer: Prevents chain slap and maintains chain tension for stable and reliable shifting performance
  • SHIMANO SHADOW RD+: Features a gravel-tuned clutch tension with ON/OFF switch for terrain-specific adjustments
  • Gravel-Tuned Clutch Tension: Switch stabilizer ON for gravel and OFF for smooth roads, enhancing chain management and stability
  • LED Status Indicator: Provides battery status, pairing information, adjust mode, and more for easy monitoring and customization
  • Compatible with 11-34T and 11-36T Cassettes: Offers versatility in gearing options for varied terrain and riding styles
  • Supports Full or Semi-Synchronized Shift Modes: Enhances rider customization and allows for personalized shifting preferences
  • Rear Speeds: 12, providing a wide range of gears for efficient pedaling and climbing performance
  • Top Sprocket: Max. 11T/Min. 11T, ensuring compatibility with a range of cassette configurations
  • Low Sprocket: Max. 36T/Min. 34T, offering a wide gear range for varied terrain and riding conditions
  • Total Capacity: 40T, accommodating different chainring and cassette combinations for versatile riding options
  • Max Front Difference: 17T, providing flexibility in gearing for different riding scenarios
  • Pulleys: Equipped with sealed bearings for smooth and efficient operation
  • Charging Cable: Includes EW-EC300 charging cable for easy and convenient recharging of the electronic system

Who is it for?
The Shimano GRX DI2 RD-RX825 Rear Derailleur is designed for gravel and mixed-terrain riders who seek a high-performance, reliable, and efficient gear system.
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