Here is the deal, my wife travels to cyclocross races with me; we have a Nissan Sentra that barely fits all of my gear. Now we have a daughter and I don't think we'll be able to fit all of our collective gear into the car. I'm typically carrying two bikes, several additional sets of wheels, along with a big gear bag. I was thinking about getting a rocket box, but I'm not sure that it will fit on the rack due the small size of our car. Anyone have any suggestions? We currently have a Thule 400XT rack with two 518 trays for the bikes. I didn't cut the cross bars when we bought the rack, so the trays could be slid out pretty far.