To the best of my knowledge, you cannot get a new truck tractor with super singles. Late in 2007 I had a customer attempt to purchase a new cab and chassis from PACCAR (Kenworth & Peterbilt). They cited a maintenance issue with the single rear tires. However, reports show that the super single tires increase fuel mileage (3%), but I see this tire gaining little ground in the near future with manufacturers. The truck conversion market is tiny compared to the commercial truck market and until the commercial industry sees real benefit to replace duals, I don't see fleets and hence manufacturers moving that way. Fuel mileage is not improved enough to offset the cost of not being able to retread these tires more than once (there is increased strain on the super singles that prohibit retreading more than once.) I think we'll see faster change in commercial trailers which will likely force the truck market.
Steve
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