Shimano GRX 810 2 x 11 Speed Rear DerailleurShimano GRX 810 2 x 11 Speed Rear Derailleur Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world. With an integrated chain stabilizer mechanism, the Shimano GRX 810 derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON