Firestone bias ply run tubeless???

[JayChicago]

Originally Posted by Zeke3

There were bias ply tires that were tubeless, they were used on all domestic passenger cars from at least the mid 1950's through the 1960's. I can't speak for the tires currently produced.

That could be the answer. The reproduction bias ply tires sold today may be manufactured to tubeless tire standards.