With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner
The Shimano Deore RD-M4120 10/11-Speed Rear Derailleur has a versatile design for both 10 and 11-speed drivetrains. It features Shadow technology for more stability during aggressive riding.
