Sram S100 EAGLE (SX/NX) Rear Derailleur - 1 x 12 - Black

Shimano Acera RD-M3020-SGS Rear Derailleur - 8 Speed - Long Cage. Proven Drag Spring cage damper for secure chain retention. Compatible with Eagle shifters using X-Actuation technology. Designed to work with wide-range Eagle cassettes.