The Lotus is an innovative concept car that is composed of several modules to adapt the passenger when and as required to ensure an ultimate comfortable ride. The entire car has been designed to be integrated into the featured single wheel and comprises three modules, two made of carbon fiber and the other one of glass. These modules can be arranged in different combinations to make this car a perfect ride for different environments. The weight of the car remains stable through an intelligent overweight counterbalance system which makes the movement of wheels independent.

Source:  Tuvie.com