why did you say you go a set of stock 16" wheels? the offroads come from the factory with 17" rims. keep those... theyre pretty rare, and desirable.
and without a leveling kit. 285/75/16, or 305/70/16, or with a leveling kit, 315/75/16.
i dont know why you want to stop using the 17" offroad rims. i wish i had a set of those.