I don't know which is best, but like SuperD, I have also noticed that there are a lot of SRW pickups pulling large 5ers. At a KOA in Wyoming last month 3 out of 4 large 5th wheel trailers near us were being hauled by SRW pickups, including at least one 3/4 ton. My wife thinks I'm nuts for even noticing stuff like that.
Not that long ago 1-ton SRW trucks were limited to around 6,000 pounds on rear axle by the 16" E-rated tires, but now with larger and wider 17- and 18-inch tires some 3/4-ton can have higher load ratings than 1-ton use to have.
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