Crossbars for Thule Evo roof rack system. The WindDiffuser technology interrupts airflow, resulting in reduced noise and drag, as well as lower fuel consumption. The TrailEdge design decreases drag by separating the air from the rack. The adjustable length scale SmartSlides also serves as an aerodynamic cover under the rack and allows for quick and easy rack installation. The SwingBlade end cap can be opened to provide access to the T-slot for easy accessory attachment. The upper T-profile with QuickAccess enables simple attachment and removal of accessories. The internal BoxBeam structure ensures an exceptionally stable load support. With the Thule buying guide, you can find the recommended crossbar length for your vehicle. Sold in pairs.