Ron,
Can you post the sizes of your wheels (bolt pattern, size, width) and tires?
That would help to possibly determine what you need.
My experience with split-rims is they are solid unless the ring is cracking. Those rims are heavy duty, and also remember that those tires have tubes inside, so it doesn't rely on the seal like a tubeless tire does. Bias Ply tires as should be on them will last way longer than tubeless radials, especially when sitting for long periods and not being moved...common with big trucks. The nylon inside the tire doesn't rot/rust under normal conditions like a steel belted radial will when just sitting. Radials will explode just sitting as the steel belt rusts and rots away, then BAM! (gone into shreds)
