After doing some research here and getting some tips , I found out that w/ 285's you might be too wide.
Some say that anything over 31" in diameter might face you with bumper or cladding triming to fit these.

Are you using your stock rims to fit the tires on?

Having 245's as of now, I have decided ( hopefully will turn out ok ) to go with: 265/60/18's given that I am getting these online for about $100 ea. and I wouldn't want to have to ship them back b/c of sizing issues.