Many of the vintage units built on Dodge chassis have split rims. Usually 17.5. What do most owners do about tires? Although radials are available I have been told they should not be installed on thos...
I had a dodge truck over 20 years ago that had split ring wheels. When I went to get new tires, I could not find a dealer that would put tires on those rims. I had to go to a salvage yard to get a set of used one piece wheels, then they would sell tires to me. I haven't had split rims since then. IMO, you need to get new wheels!