FlowBelow Aero’s Wheel Covers with Easy Air Access relocate the inflation valves for both inner and outer tires to the center surface of the wheel cover, allowing drivers and technicians to check pressure and inflate tires without kneeling or removing the covers. Both valves sit between 20 and 22 inches from the ground. The system extends the valve stems and routes them through the center ring of the aerodynamic cover. Optional auxiliary valves accommodate tire pressure monitoring systems. Track testing by MVT Solutions found FlowBelow wheel covers save 1.74 percent in fuel when installed on both tractor and trailer, or roughly 2.16 gallons per 1,000 miles.