The reliable Shimano GRX Di2 RD-RX825 rear derailleur is a component of the electronic gear shifting system designed for gravel bikes. It allows for quick and precise gear adjustments with a light touch on a sensitive button. This solution is aimed at those seeking the best performance for off-road cycling, combining road bike architecture with MTB. The derailleur is precise, resistant to dirt, shocks, and vibrations, making it excellent for gravel racing and classic cyclocross. It is also an excellent choice for long and demanding adventures - nothing will surprise you regardless of the conditions.

Traffic Management Center

The main processor and communicator of the system is located in the rear derailleur. No separate control or communication unit installation is required. This makes the whole system lighter, aesthetically pleasing, and easier to use. It also features a charging port with a cover and an LED indicator showing the current battery status and its operation. Settings can be made with buttons or via an app.

Main Features

• 2x12: This setup provides a wide range of gears, allowing for quick shifts and very precise frequency adjustments to conditions.
• 40T Capacity: The derailleur can handle an 11-36T cassette, ensuring smooth gear ratios that are very useful on uphill routes in rough terrain.
• Reliability: The electric system operates steadily regardless of temperature, weather conditions, and usage time, even with the mechanism covered in mud or snow.
• Clutch Switch: During off-road cycling, the clutch prevents excessive chain "sway," and on paved roads, it can be deactivated to increase precision.
• Di2 Technologies: The refined electronic shifting technology ensures reliability regardless of weather, usage, and radio interference.
• E-Tube: E-Tube is a "service" that connects cyclists, bikes, and Shimano via websites or apps to make cycling even more enjoyable.
• Shadow RD+: The combination of a low-profile derailleur and an adjustable slider with a switch allows for a radical improvement in performance duration over irregularities. The chain remains taut even on uneven surfaces, allowing for quick gear changes.

Brand Shimano

The well-known Shimano brand is a leader in bicycle components - over half of the global bicycle component market belongs to this Japanese company. The wide range of components allows for the selection of products tailored to every type of bike, including models for e-bikes.