The air powered Puch is a very interesting concept and while the seven-mile range might not sound like much, it is plenty for getting around city centers. Add to that the convenience that it takes only a couple of seconds to refill the air from a larger cylinder and you have something that could just work.

The only drawback to this system as I see it is that it is running on clean air; of the sort that is generally found in diving cylinders. If you have your own bottles, that is going to cost you $5 or $6 per big bottle and could push the running cost up a little over an electric bike. On the other hand, there is no need to run the system on dive-grade air. If you are not going to use the cylinders for breathing then there is no reason why you couldn't fill it yourself with standard compressor air. [Motorcycle News via Ecogeek via DVICE]