As I took a moment to take a second look at this picture of the
MIT ' Hiriko' folding urban EV:
I did a double take on the wheels. They look to be earth-going versions of the Lunar Rover wheels? And they are similar to the
ERW (Energy Return Wheel).
If their aerodynamic openness would need a solution, but they have two things that would be very good for a high efficiency car: lower rolling resistance than conventional wheels (the ERW claims 50% improvement) and they would not require inflation checks; which are more difficult when they are enclosed in low drag body work. And they can't blowout.