By streamlining existing contours of trucks and trailers aerodynamic benefits become fuel savings for virtually all highway applications. Fuel savings from improved aerodynamic efficiency occur most dramatically with increasing road speed. In SAE type 2 J1321 fuel efficiency tests the DEFLECKTOR Aero Wheel Cover was found to save 1/4 of 1% per cover. A tractor trailer can expect an increase of 2% when installing the covers on all eight wheel ends.
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