Compared to the other aero crossbars, the Thule WingBar EVO Crossbars # TH711300 include a top-of-the-line design and materials. The WingBar EVO Crossbars are made with a TrailEdge shape and have WindDiffuser strips that help with maintaining air resistance. Another feature that sets them apart from competitor aero bars is the rust-proof materials compared to the simple corrosion-proof materials of the Yakima JetStream Crossbars # Y00425 and the Rhino-Rack Vortex Aero Crossbars # RRVA126B-2.... view full answer...