be VERY carefull that you get a rim properly rated. you need a 2500lb capacity rim. I was looking at some Alcoa look alike made by eagle to match thos on my tow rig. They were only rated 1900lb. I neded up going with a rem ver simular if not the same as the current coaches get. I bought the rim with the Goodyears mounted for $149 each. They do need to be ballanced.
http://www.trailer-parts-forless.com...l_assembly.htm
Those are correct size and rating with the good tires on them. DO NOT BUY THE LUG NUTS take your and go to a local place. They only stock the 1/2 and on the vintage coaches it's the wrong size. The vintage need the 7/16 size that GM also use on the 70's and 80's 4x4 trucks. About $.75 each from Auto Zone for the nice chrome acorn.