I got on to the Dyna Beads when I first got my 1974 VW Thing. It has those vintage 5 on 205mm bolt pattern rims. And these days, NOBODY has adapters for modern tire balancing machines. Finally, I had an adapter made in a machine shop, but because it is only an adapter, the balancing still wasn't on the mark to my satisfaction.
Enter the Dyna Beads. By adding them after a physical balancing, they assure me a perfect, continuing balance. But I think the trick is a physical balance first, then add the beads. In any case, I've used them in my car for 12 years now and am quite satisfied. I also use them in my trikes as well, of course.
Bob Witte
The Trinity Trike