You had me going there for a minute. I mean... it is a two seater car. One passenger is the default by design. I used to regularly get three adults in my 280Z back in the day, A child could fit in the rear deck area easily. Must have done that at least a couple of times as well. The cabin of a 280Z is cavernous in comparison to the SmartCar, widthwise at least. Headroom was a tad lacking. Anyway, the no more than one passenger thing, that is one company stipulation that it would probably be wise to heed. I don't know about the Free2Go rack but the racks that are supplied with Portland's Car2's do hold two bikes.