A wheel that floats on it's own electric motor armature drive and bearing in one? Such a electric motor mike work better with a shaped factor to turn the motor. Ie instead of magnetic coils all around the shaft it would have off central magnetic "firing" like a magnetic cylinder? A magnetic cylinder firing to repulse a magnet or coil on the motor and wheel axle?
Or at a certain speed air foil lift from the front of the car causes the downward pressure on the bearing to decrease as air foil levitates the weight off the bearing?