Have been using Thule for many years. For the last 5 years, the trunk has simply not been removed from the car. It was a Thule AeroBar on a smooth roof. No noise, no consumption, no discomfort noticed . When buying these, I expected more . the price is space and they make a lot of noise . I read the forums, I think the point is in the aerodynamics of the Octavia station wagon itself. Judging by the reviews of other users of the trunk, they did not encounter such a problem.
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