Think about this for a minute: Let’s say you’re a highway fleet looking to obtain the best possible fuel economy for your big rigs, which operate on mostly flat roads in the Midwest hauling some 60,000 to 80,000 lbs. in dry van trailers. You might start with a “soup to nuts” review of your specifications; maybe you look at shaving some pounds off of the suspension system, adding aerodynamic devices to the tractor and trailer, or switching to wide-base tires.

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