As I recall the super single large tire max load capacity was 10,200lbs. That is a far cry from the load carry capacity of two tires that can carry about 6,000 each. Many of the 20,000lb axles are carrying over that figure and I would think those rigs would be running over the super singles tire capacity. The people I weighed that had that tire when I was weighing RV's all seemed to like them and thought they rode smoother than the duels that were on the unit before the replacement.