Yes, stability. Three wheelers need a bit more width to retain the same anti-roll-over as a four wheeler. It's pretty easy to see when you draw a polygon from each wheel where it contacts the ground, and consider the height of the center of gravity. Just make a simple scale wire model of that (simple triangles) and see how hard it is to tip each model over. The model of an SUV will be easier to tip over than the Elio if you correctly position the CG height.
Since the Elio has these outrigger wheels, more width is not much dis-benefit to aerodynamics. In fact once an outrigger is too close, it messes with the aerodynamics at the main body's surface. Of course enclosed fenders would be a completely different evaluation.
Too much information? Typically, yes, that's me!
) last night. It didn't go over well.
