Shimano CUES Shadow RD+ Rear Derailleur 1X 10/11-speed RD-U6000-GSTackle trails and choose rougher routes with confidence Tackle trails with this versatile 1x11 speed rear derailleur's seamless shifting and pedaling. Its low profile design and chain stabilization give riders the confidence to choose rougher routes. FEATURES Stable drivetrain performance on trails, gravel, and city streets Chain stabilizer reduces chain drop, slap and noise Low profile design is optimized for rough terrain Total capacity: 39T Max low