Shimano RD-U4010 CUES Rear Derailleur 9/10 Speed One SpecThe Shimano RD-U4010 CUES Rear Derailleur is engineered for the 1x9 or 10 hybrid or mountain drivetrain setup. The design is simply to give stability while riding on trails, gravel and city streets alike. The Shadow low-profile design protects rear derailleur from obstacles in a wide variety of riding scenes. The pulley teeth are both 11. The max low sprocket is 36t and the min low sprocket is 39t. Compatible with Shimano mountain and hybrid shifters.192790997858