Denago Commute 1 step-over (top tube) and step-thru eBikes are equipped with a replaceable derailleur hanger. In the event of impact, the derailleur hanger is designed to fail, sparing the more expensive frame and rear derailleur from damage.A spare rear derailleur hanger is a great item to have in your toolbox, especially when traveling.kit includes replacement derailleur hanger and 2 fixing screwsCOMPATIBLE ONLY WITH DENAGO COMMUTE