Cars like the Hyundai Accent have a load capacity of about 750 pounds. I believe that Hyundai does not recommend that you tow anything. Most roof racks have about a 150 pound load capacity,not because the rack can't support more but because of the way it affects the centre of gravity of the car. Frankly, I don't see any way you could safely transport 9-11 very heavy bicycles. My suggestion is that those times each year you need to transport that many heavy bicycles that you go and rent a full size van