Rizoma 1 Universal End Mount Mirror Adapter These Universal End Mount Mirror Adapters are meant for affixing Rizoma's Spy-Arm, Spy-R or Spirit RS mirrors to bikes that do not have a bike specific End Mount Mirror Adapter available. Features Mounts Rizoma End Mount style mirrors (Spy-Arm, Spy-R and Spirit RS) Fit most 1 bars with 21mm-23mm inner diameter Aluminum construction Sold each