Shimano GRX Di2 RD-RX825 12-Speed Rear Derailleur

Like Dylan in the 60s, gravel riding has gone electric. The Shimano GRX Di2 RD-RX825 12-Speed Rear Derailleur brings smooth electronic shifting to rough roads with Shimano’s excellent Shadow RD+ technology. Shadow RD+ makes for easy wheel removal when the derailleur is turned off, and when turned on, it adds tension for a quieter ride and more precise shifting. Like Shimano’s road 12-speed Di2 systems, the rear derailleur is the communication hub of the drivetrain, communicating wirelessly with shift levers, cycle computers, and your smartphone. The results speak for themselves, making this the go-to 2x12 setup for gravel riders seeking the best of the best.