Shimano GRX RX827 Wireless Di2 Rear Derailleur

The Shimano GRX RX827 Wireless Di2 Rear Derailleur is built for gravel riders who want top-tier electronic shifting without the cable routing — fully wireless, fully sealed against the kind of conditions that eat lesser drivetrains alive. The aluminum outer plate is designed to take impact, and the wide-link construction handles the cassette range and terrain demands that gravel riding actually puts on a drivetrain.

The RX827 supports a 10-51T cassette, giving you enough range to grind steep climbs and stay efficient when the road flattens out. Shimano's Automatic Impact Recovery function is designed to detect strikes from trail debris and return the derailleur to its working position without any input from you — a detail that matters when you're deep into rough terrain and not thinking about your drivetrain. The Shadow ES low-profile body reduces the derailleur's exposure to snag points, and the integrated skid plate adds protection where ground clearance disappears. The enclosed, removable battery keeps the electronics protected regardless of weather or mud.

Shimano GRX RX827 Wireless Di2 Specs at a Glance

• Fully wireless Di2 electronic shifting
• Compatible cassette range: 10-51T
• Aluminum outer plate construction
• Automatic Impact Recovery function
• Shadow ES low-profile body with integrated skid plate
• Enclosed, removable battery