Holy new guys! Welcome... 285's will definitely not fit a 3rd gen with stock height, it'll rub everywhere just backing out of the driveway. Jaderunner runs that size in GY MTRr's, but he definitely has a lift. He may be able to tell you more though. hth...
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 06 TW200, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50