https://www.amazon.com/gp/product/B06WRVBSC9
Self balancing tires using disposable beads. I've seen some folks on other forums swear by them, especially for wire wheel rims like on Cobras.
I have seen several threads on the Model A forums asking about the beads...a lot of folks like them but a lot say they don't make any difference. A Model A has vibration that was built in at the factory. :) Does this mean it is concours? ;D
TOB
I have used them. They can't balance a bad tire.
I now watch the run-out on the balancer. If rotating 180 degrees won't fix it, I reject the tire for one that is actually round.