That the bicycles raise up on the roof fuel consumption, I also know. But I wanted my car, which is parked in the city, do not make any longer, so the wheels are best housed just above. Installation is simple and sufficiently well described. The rebuilding of the other side of the car works well, both sides are then not exactly mirror-what does not bother. Who wants to mount his bicycle on the roof, should be able to lift it without any problems, the rest is a breeze.
