Why the wheel is not designed to turn to 90 degrees, that is, the kind of sideways open?
Technically no problem, the problem caused by the price of your expensive four or five times you will buy it
How to do after the drive? How about four-wheel drive?
Audi has been the concept car is done, the specific way is to become a spherical tire.
Insider try the electric car after 90 degrees, the rear drive will be in the front of the case of the car forward to push forward.