I too,get those kind of questions or statements.I have been driving Ford Explorers since 1991, on 15" ATX's and 16" wilderness AT's, with no problems at all.In fact,I do a lot of off-road in col.,and n.m. and have put a lot of stress on both the vehicle and the tires, without a single problem other than your typical flat once in awhile.
And to all those people who are worried about suv's, stay in your sedan's, and stay on the pavement.And if you don't know how do drive a suv, get back in your sedan.