designer's own words:SKYWHEEL-BIKE * Feature of SKYWHEEL-BIKE 1. The user can unfold the folded bike within one second. (Like an automatic umbrella, it can be unfolded if the button is pressed and it can be folded if the slider is pulled up with one hand.) 2. When it is folded, its appearance is very elegant. So, it can be used as a shopping cart. And the user does not need to worry that it may be parking and stolen. 3. It is very structurally stable and its frame parts can be used for many other purposes. Its production costs are very low and it is very simple and lightweight. 4. It is possible to produce it with the same geometry of the existing diamond-type frame bike. 5. It has a function of shock absorption. 6. It can easily convert it into an ultra light motor-operated bike if insert the motor inside the seat tube and the battery pack inside both sliding bars. *If the frame parts are produced with the use of aluminum die casting techniques, they look beautiful and can be lightweight. It is also possible to promote the improvement of productivity and to ensure the uniform quality control.