Thule aluminum wing bars to fit audi a6 4g2 2011 onwards thule wing bars to fit audi a6 4g2 2011 onwards not only is the thule wing bar safe stylish and aerodynamic itand39 s also extremely quiet in fact itand39 s so quiet one can easily forget itand39 s mounted on the roof altogether whether you are biking kayaking skiing or whatever the thule wing bar will enable you to engage in an active lifestyle to the full wind tunnel tested what was the result 13 db lower n