SRAM's UDH derailleur hanger combines thousands of different types of derailleur hangers and can be used with conventional MTB and E-MTB drivetrains. It sets new standards and is compatible with all frames that are based on this open standard. It protects your shifting system from chain slap by swinging backwards without getting in the way. It also shifts slightly in the event of an impact. At the same time, it improves shifting performance and promises better alignment. In the event of an impact, it rotates backwards counteracting a possible chain slap.