Last weekend I confirmed that the rims for this truck are the base 16x4" wheels. We are going to get them sandblasted tomorrow so that Steve, the truck owner, can paint them.
We are considering tires with either a 195 or no more than a 205 section width and in a higher profile (minimum 75 aspect ratio). I am concerned that a 215 section is just too much for a 4" wheel. We should be able to find a tire that has an acceptable diameter and load rating within those parameters.
Thanks for all the help.