Salad dodger, I agree with your comment about weight, I used a thule 4 bike one on my last car an MG ZT-t (basically a boy racers Rover 75 estate) used with the car fully loaded, and made the handling very interesting whilst racing "fast" touring on holiday up the Alps, the added weight was tending to push the back end of the car out, making the handling interesting, not dangerous but quite entertaining.