There are plenty of E rated tires out there in 18 and 20 inch sizes. Toyo, Nitto, Yokohoma, Mickey Thompson, Dick Cepek, Goodyear, Continental and more all make an E rated tire in big inch wheels. There are a few 22 and 24 inch tires now as well, not that you'd be doin a whole lot, if any, heavy hauling with rims that size.
ok sounds like the supplier problems are solved since the last time i did
any looking or listening to friends (04s w/ 18" and friend w/ 05s w/ 20")
but the matter of COST remains...as compared to the 16"...personally
id love to have a set of 18"s on mine...i think they look nicer...and fill
the wheel well better.