We do have adapters to allow the Roadmaster Base Plates, # 172-5, to work with Blue Ox tow bars. If you have an Aventa, Aventa II, Kar Bar, Aladdin, Alexxa, or Acclaim RV-mounted tow bar, or an A-frame Blue Ox tow bar with 1 or 3 pronged attachments, you can use RoadMaster Base Plate to Blue Ox and Demco Tow Bars Adapter, # RM-033 or # RM-032. Base plate installation can be moderately difficult, but if you have experience with automotive projects you will be able to perform the installation... view full answer...