try searchin in the garage. been talked about a bit now and then.
and i have posted some info on the correct spacers to use.
i did a set of 265/75/16 on drw rims with 2" and it was perfect for the guy as he still loaded and worked the truck. had nice gap for no tire rubbing. 285 would have just fit with tiny rubbing empty.
dont forget 255/85/16 tall skinny.