Roy,
I drive a T250 with them dinky 235 10ply tires. They carry 3000 lbs rated like the 245-75-16 tires on a sprinter, a number of GM pickups also use the 245 tires at 30.5". The 245s handle equal GRAW loads way better!
285s handle loads pretty well too. I would prefer my 285-65-18 32.5" 10 ply on my pickup. Better yet, something in the 305-325 width relm if going upwards of 5000 lbs capacity per tire. That's better than the 215-85-16 on my 05 dually had. 245s made for better handling, lasted twice as many miles vs the stock 215s.
Marty