Occupying a new realm in shifting performance, the redesigned SRAM XX1 Eagle derailleur gives no-compromise racers and dream-bike builders a true top-tier option. The crisp, precise XX1 shifting feel athletes rely on now features an updated cage geometry for improved chain management. Occupying its rightful place at the top of the Eagle ecosystem, the XX1 Eagle rear derailleur makes full use of the new 10-52t cassettes and is backwards compatible to also work with the 10-50t. FEATURES Updated cage geometry provides better chain retention and crisper shifting. Comes in XX1 Eagle master colorway as part of Eagle Colorsystem to go with all cassette and chain color options - Black, Gold, Rainbow, HardChrome and all-new Copper. Backwards compatible, works with 10-50t and new 10-52t cassettes. SPECIFICATIONS Speed (RD): 12s Cable pull ratio: X-actuation Cage (RD): n/a Max tooth: 52 Color (RD): Lunar Pulley bearings material: n/a Cage material (RD): n/a