The local manager of Les Schwab said he puts about 12 sets of Coker tires on vehicles each year and never uses tubes in them. He said he has been doing that for years and no one has ever had a problem. He is well aware of the diamondbacks, but avoids them because they grind off the sidewall before they apply the whitewall. Just FYI.
I think the preceding comment only contains half of the real facts.
I would venture a guess that the majority of the Coker tires the Schwab dealer installs are 14-15" inch on later model wheels/cars.
It would be interesting to know how many of the tire mountings were on '40 or earlier wheels.
My brother has a '37 Ford sedan that needs tires. He wants to drive the car this summer to a few car shows, however, he don't have the money to purchase new tires.
I had a set of near new 600x16 tires sitting on the shelf in my garage, the tires are 3" WW's, they were mounted on '36-39 wheels. I had the tires demounted and gave then to my brother.
He called me yesterday afternoon, ticked off because the tires had gone flat over night.
He had called the tire store that mounted the tires, they said that his rims looked good enough to work with tubeless tires, so that is what they had done, they said that maybe he would have to purchase tubes for the tires.
I told my brother that he had better go look at the tires, they clearly said "TUBETYPE 600X16 4ply, on the side wall.
I had not told my brother that I kept the tubes which were in the tires because I felt he should buy new tubes. I did not add that I had a use for the tubes, is why I had not given them to him.
I think the guy that mounted the tires is about as smart as a box of rocks, probably about the same mentality as the "Schwab Salesman"...