The Shimano GRX Di2 RD-RX827 is a wireless rear derailleur designed for demanding gravel cyclists seeking precision, reliability, and durability. Equipped with a long SGS cage, it supports 10-51T cassettes, offering a wide range of gear ratios—ideal for steep climbs and fast descents. Thanks to the SHIMANO SHADOW ES design with a durable conical-shaped body, the derailleur handles rough terrain exceptionally well. The integrated chain stabilizer maintains chain tension and reduces the risk of chain drops—even on uneven surfaces.

Modern Wireless Di2 Technology

The Shimano GRX RD-RX827 is part of a new, fully wireless Di2 system specifically designed for gravel riding. Based on technology from top-tier XTR and ULTEGRA series, this system provides rapid and precise gear changes without cables. With an automatic return function after impacts, the derailleur resumes its position after contacting an obstacle—often so smoothly that the rider hardly notices any change. The derailleur also features an LED indicator showing battery status and connectivity.

Customization and Durability

The RD-RX827 is not only durable but also fully customizable. Using the E-TUBE PROJECT Cyclist app, users can easily adjust derailleur settings according to their riding style and terrain conditions—updating firmware, changing shift response, and assigning custom functions to shift buttons. Its solid construction ensures resilience even in dirty and rocky environments. Installation is straightforward on the horizontal arm without the need for special adapters.

Di2 Technologies

Sophisticated electronic shifting technology ensures reliable performance regardless of weather, usage, or radio interference.

Shimano GRX

The Shimano GRX series is a line of components specifically designed for gravel bikes. It includes drivetrain parts, brakes, wheels, hubs, and SPD clipless pedals. The components in this series are characterized by lightweight and very smooth operation. Available in 10-, 11-, and 12-speed versions, including electronic Di2 options.

The Shimano Brand

The well-known Shimano brand is a leader in cycling components—holding over half of the global market share for two-wheel parts. Its wide range offers products suitable for all types of bikes, including e-bike models. Regarding e-bikes, the Osaka-based manufacturer developed the widely used STEPS support systems, praised for motor efficiency and battery capacity. There’s much more to say about Shimano shoes, glasses, and apparel—but it’s best to explore the selection of Japanese products available on our website.