Nice rims for the price! However, I wouldn't do a 285 tire on the 9's, or a 255 on the 8's, for that matter. It changes the tread contact patch a little too much, to go wide like that. And, as you probably already know, most of us Supra guy's, need all the help we can get, in the traction department!:icon_razz
I recommend, no wider than 245's, f/ the 8's...and 275's, f/ the 9's. If you are dealing with any kind of good tire professional, they will tell you the same.
Pic's when mounted please!:icon_bigg