scratch that just called and they dont reccomend it.
Translation: "We're scared of lawyers!" Unless there's a DOT number on the wheels certifying them for passenger car/truck use, the factory can't legally sell them for the purpose you described. It would be like running a Goodyear Eagle racing tire on the street. No DOT number="not street-legal". It has nothing to do with balance or anything else, just legalese.
Jerry
FYI I called Stockton Wheel and they said the same thing - they'd probably work just fine, but the trailer wheel vendor can't legally tell you that.
Sounds to me like this is worth trying out. $50/rim for new, powdercoated rims is a good deal compared to the $25/wheel I've spent plus the extra $50/wheel (minimum) i'm gonna spend for media blasting and powdercoating.