Thule AeroBlade Edge Raised Rail Roof Rack System (1 Bar) Integrated bar and foot design combines foot and bar together for a low-profile, aerodynamic package, and pre-assembled for fast, easy installation. Designed for cars with raised side rails. WindDiffuser technology disturbs airflow to reduce noise and drag for improved fuel economy Cars with sun roof: Due to the racks' low fit on the car, it may not be possible to open the sun roof when the racks are installed. Please check clearance before opening your sun roof. Boxbeam load bar structure creates the strongest aftermarket load bars in the world T-track compatible for fast mounting (Thule Xadapt required for some carriers, see Thule Buyer's Guide for details)