The transport industry is moving to super singles. In my case the rear tires can carry the load and I get much larger front tire for better handling and braking. I hear of so many scary stories of reducing the air in the rear tires for better ride while singles give air bags quality ride with 80psi inflation. The tires on mine take all the road bumps, so much that I will steer the truck wheels in the pothole to save the trailer tires.
Most 5th wheels do not load a dualy tires enough for them to take the road bumps smooth enough. And when one tire runs unflated the remaining tire will be overloaded and damaged.
I experienced super singles and they outlasted the duals while being over loaded 50% on our log trailers.
Barbara and Laurent, Hartland Big Country 3500RL. 39 ft long and 15500 GVW.
2005 Ford F250 SD, XL F250 4x4, Long Box, 6.0L Diesel, 6 Speed Stick, Hypertech Max Energy for Fuel mileage of 21 MPusG empty, 12.6 MPusG pulling the BC. ScangaugeII for display..