The Universal Derailleur Hanger combines thousands of hanger options from across the industry into one solution. It protects your derailleur from chain jams by pivoting back and moving out of the way, and it also slips slightly when it encounters impacts. This design improves shifting performance, ensures better alignment, and is compatible with all drivetrains. Plus, if you ever need a replacement, it will be readily available everywhere. The UDH: one reliable and effective hanger.