SUPERIOR PERFORMANCE To ensure exceptional shifting and optimal performance, the X01 Eagle derailleur is equipped with a new clevis architecture that further improves chain management.The X01 Eagle rear derailleur works with the new 10-52 tooth cassettes and is also backwards compatible with the 10-50 tooth versions.Because it's part of the new Eagle Colorsystem, its main X01 Eagle color is perfectly matched with all cassette and chain colors.The redesigned clevis improves chain guidance and ensures more accurate shifting.Backwards compatible, it works with 10-50 teeth cassettes and the new 10-52 teeth versions.Rear Derailleur X01 Eagle 12 speed Red Max 52TAdjustment toolLong Cage Group Sram X01 Eagle 12V Speed 12