Shimano Deore Rear Derailleur ? RD M4120 (SGS, 10-Speed)

The Shimano Deore RD-M4120 is designed to perform, utilizing the Shimano Shadow+ Design, the Deore M4120 rear derailleur delivers consistent mountain biking shifting performance over rough or all kinds of terrain and challenges. The low profile and sleek design avoid damage from rocks and is designed to work on a 2*10/11-speed mountain bike drivetrain.