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. - updated 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.