I know most suitcase these days have four wheels. However, when you pull it on the road, in most cases, you are only using two wheels. It makes pulling difficult, especially when you have many things laid on top of your suitcase. Balance Wheel Carrier try to solve this problem by providing 3 wheels, which keeps the balance of the suitcase and eases wobbling with shock absorbers. The fifth wheel is integrated at the lower back of the suitcase, which you can easily pop it in/out with you foot. Allowing 360 degree rotation, this fifth wheel will make dragging suitcases a piece of cake.
via: yankodesign