Truck rack is at the ideal bed-level height to sit below the cab of the truck for improved aerodynamics Universal mounting brackets require no cutting or drilling and work with traditional bed rail and trucks equipped with bed-mounted track system WindDiffuser technology disturbs airflow to reduce noise and drag for improved fuel economy Designed to fit most full-size and heavy-duty pickup trucks and works with a variety of Thule tents, racks, carriers, and other accessories Made from durable, corrosion-resistant aluminum for years of use