On Jan 5, 7:28 am, "Peter Dohm" wrote:

Nearly anyone in a tire store would have known about inner tubes and their
basic sizes--which I believe are a little like the sizes of sweaters and
socks. They would be a slow selling item in most places, and would probably
need to be ordered in; but they will be in use as long as there are wire
wheels and split wheels.

And even then they will be a rare item for vintage vehicles.
Earthmoving and heavy equipment has been using multi-piece wheels for
many years, but the rings have seals under them to enable tubeless
operation. Sold a whack of that stuff in the '70s.