Shimano GRX RD-RX810 11-Speed Rear Derailluer

Gravel riding has evolved to the point where a mixed-surface drivetrain makes a whole lot of sense: the Shimano GRX RD-RX810 11-Speed Rear Derailleur has an adjustable clutch to retain your chain as you contend with rapidly-changing terrain. Compatible with road cassettes with cogs up to 34 teeth, this hits the sweet spot that neither road nor mountain derailleurs can.