I know this has been covered extensively on the forums, but I haven't seen anything related to what I have. My rear duals are in need of replacement. The fronts tires are good. I wanted to know what wheel type I possibly have and whether I should replace just the tires or go with a new tubeless wheel. Any help would be greatly appreciated and thanks for your time.
Specs: 1941 1.5 ton GMC 20in wheels 5 lug 7.75" center to center on lugs Hub is 6in.
Figure out what rims you have by looking at the sticky thread in this section. As long as you don't have the true RH-5 widow makers and your wheels are in good shape, use them. Anything model looks, well..... Modern!
You have hub centered wheels commonly referred to as "Motor Wheels" (the original manufacturer). This kind of wheel from back then also came with 6 lug bolt pattern in different applications.
Not sure I've seen any 22.5" (for tubeless tire) motor wheels with 5 lugs, but I have seen a few and have one with 6 lugs, see picture. https://photos.app.goo.gl/258xVFja7ikaeJYF3 ...Which is of no help to you except the faint hope that you might one day find 5 lug 22.5" Motor Wheels, if they exist.
When I take off the rear dual that is in need of repair, I will take a look at the wheel and determine the wheel type. Thanks again for your help. I don't have any pictures of the inside, but to the best of my knowledge, the wheel center is revited into the wheel ring and outer sliver portion is the locking ring. I'm a newbie at this, but trying to figure it out. Thanks again for the information. I will post pictures when I get it removed and broken down.
Hy Capt D, as Grigg has said you have a Motor wheel there, that one appears to be a two piece design. When you go to remove your other wheels, have a good look at them to see if they look the same as the one in your picture. If any of your other wheels have a boxlike structure on the inside of the wheel running around the inside circumference, then don't mess with them until the valve core is removed and all the air is exhausted from the tire, those wheel are dangerous when they have any air in them.