Shimano GRX DI2 RD-RX825 Rear Derailleur

SHIMANO GRX DI2 RD-RX815 REAR DERAILLEUR

One thing is for sure and that is both gravel riding and electronic drivetrains are rapidly growing in popularity. Shimano decided to combine these two categories to create the Shimano GRX Di2 RD-RX815 Rear Derailleur. It is a gravel-specific rear derailleur that shifts electronically. It has an adjustable chain stabilizer that prevents chain slapping and drops and gravel-tuned clutch tension. It has silent and uninterrupted rear shifting on rough terrain and smooth and reliable mixed surface shifting.