Caterpillar / City bikes

Concept

The teeth of a saw are used as the chain, giving a mechanical feel, and making it easy to fold the bicycle.
The length of the frame of the traditional bicycle was reduced, and the design is entirely new as well.

Rather than the complicated structure of the bicycle chain, a simple structure of sawtooth was used in the design. Also, the frame of the rear wheel was designed using the teeth of a saw.

“Caterpillar” can be folded easily with a single action.
The two rear wheels get folded around the sides of the front wheel, so that less room is needed when storing the bicycle.