Crossbars for Thule Evo roof rack system. The WindDiffuser technology disrupts airflow, resulting in reduced noise and drag, as well as lower fuel consumption. The TrailEdge design minimizes drag by separating the air from the rack. The adjustable SmartSlides length scale also serves as an aerodynamic cover under the rack, allowing for quick and easy rack installation. The SwingBlade end cap opens to provide access to the T-slot for easy accessory attachment. The upper T-profile with QuickAccess allows for 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.