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
7.75" center to center on lugs
Hub is 6in.
I can attach picture when enabled.
2 more posts and you’ll have full privileges.🛠
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!
Off the top of my head that bolt pattern may not have any modern (tubeless) wheels.
Best bet is keep the originals if they’re in good shape and not the RH5, which I doubt they are.
Thank you for your help. I would like to stay with the original wheels, but safety is paramount. Any recommendations on tires for the 20in wheels?online? Order through local tire shop?
Here is the image of the wheel.
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.
Your wheels are perfectly safe and very good looking. Stay with them. When you need work/mounting done go to a Truck Stop. They will have the knowledge and equipment.🛠
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.
I would absolutely Love it if I could replace the 20's on my 50 4100 with a 19.5 steel wheel/radial tubeless tire. If a 19.5 cleared the rear drum, I would think with modern machining it wouldn't be that difficult to make a wheel with the right center bore/bolt pattern.
I took some pictures of the inside of the wheel.
They look nice, and they are not Firestone RH5 design.
If they're not rusty inside and or damaged they're fine to reuse.
About 2-3 weeks ago I did replace mine with a brand new set of 8.25-20. The. Old ones were cracked and "out of round". The ride now is much better and most importantly, safer. Firestone were available, but I hoped for a foreign brand to save a pile of money and still have the project going.
When I got the truck, it was mounted on 7.50-20, Wich, in my area are impossible to find with out giving out an arm and a leg. My rims are 6.00 X 20, three pieces in good condition.
If you have a bit of knowledge in mechanical work and tires, don't be affraid of tackling them, just respect a few safety rules, and make sure all the parts are clean and in good condition. You just need a duck bill sledge, couple of pry bar and soapy water. To inflate them, I first set them with about 15 psi, then mounted them on the truck, then fully inflate with a remote valve and gauge. In the back, if something goes wrong, the rings are facing each other, and the front, a few loops of loosely wrap chain can do the job. Just make sure everything set and seat good, if not sure, or not right, release all the air, and reinflate. Go for a ride around the yard if possible and reinspect.
I went with the original style to keep the original look. 19.5 are ok, but are several inches smaller and, in my book don't look right.
It is an old truck, with old suspension type, and what we can barely called a seat for today's standard, so unless you upgrade EVERYTHING, even with radial tires, it will still ride like a stone boat.
Just my 2 cent.
22.5" Motor Wheels with 5 on 8" do exist, although they are somewhat rare, I have two.