285 is too ****ing small.
I have 285's on my 10.5" wheels. I tried to buy 315's. The guys at the tire shop down here argued with whether or not 315's would fit in the back of a mustang for 15 minutes. In the end, because the owner of the shop is a friend of my family, I gave into their BS (well, I was actually trying to buy Nitto DR's, but our friend convinced my parents they were unsafe, and since I wasn't racing at the time, I just gave up and said give me the biggest you can fit on it). Biggest mistake I've made with my car.
2nd mistake: the 245's I got on the front 9 inchers.
Absoultely no rim protection from either.
So to answer your question, 285's are too ****ing small.