That would be my guess as well. Like I said they fit fine and don't rub at all offroad (my dad's work truck, it sees pretty rough conditions at least 4 days a week) With 285's I would imagine that you would run into some rubbing issues and would need a 2" lift to clear things

'80 Isuzu LUV, 3" BL, cranked t-bars, small tires and not alotta power
'92 Rodeo...work in progress
Hmmmm...DIRT!!!