Have you ever tried getting your wide 5 (5x205) steel wheels on your pre-66 Bug/pre-72 Bay/Splitscreen/Thing/Ghia balanced at a balancing shop? If you've, you must know that the wide 5s can not be balanced at all the available balancing machines here in Pakistan due to the fact that the mounting point on balancing machines is way smaller to hold the wide 5s in place to spin the wheels and thus do the balancing.
This adaptor bolts onto your stock wide 5 steelies using original wheel lugs and makes it possible to mount the wheel on any of the balancing machines to be balanced to perfection.
Also, this adapter can serve as spacer as well where tyre width is more than stock and one has rubbing issues. I hope this helps
Read more about Wide 5 (5x205) Wheel Balancing Adaptors and order yours HERE