deragliatore posteriore sram x01 eagleSram X01 Eagle Rear Derailleur Raising the shifting standard, expanding capabilities, the X01 Eagle derailleur features an updated cage design to provide better chain management than ever. The X01 Eagle rear derailleur works with the new 10 52t cassettes and is backward compatible with 10 50t options. As part of the new Eagle Colorsystem, it is available in the signature X01 Eagle color to perfectly match any cassette and chain color a rider desires.