Sram: ELEVATED CAPABILITY Elevating the shift, expanding the capable, the X01 Eagle™ derailleur features an updated cage architecture, to provide better chain management than ever. The X01 Eagle™ rear derailleur works with the new 10-52t cassettes and is backwards compatible to also work with 10-50t options. As part of the new Eagle™ Colorsystem, it comes in X01 Eagle™ master colorway to go perfectly with any color cassette and chain a rider wants.FEATURESUpdated cage provides better chain retention and more precise shifts.Comes in X01 Eagle™ master colorway as part of Eagle™ Colorsystem – to go with all cassette and chain color options - Black, Gold, Rainbow to HardChrome and all-new Copper.Backwards compatible, works with 10-50t and new 10-52t cassettes. SPECIFICATIONSSpeed (RD): 12sCable pull ratio: X-actuationCage (RD): n/aMax tooth: 52Color (RD): Red, LunarPulley bearings material: n/aCage material (RD): n/a