The 16" wheel is 7" wide. The 285 is 11" wide. Should fit ok considering many folks run 315s (12.5" wide) on stock 17s, which are 7.5" wide. Like jk said, you would most likely need wheel spacers. And, if you offroad and get into some semi-flexy situations, you will probably get some fender rubbing.
Anyhow, the spacers you need to look for would be something like these from Spidertrax