Breathing Bike / bike

“Breathing Bike” is a device that pumps up the bicycle. In riding the bicycle, the wheel can act as power source to the inflator,so the inflator can pump up the tyre constantly.Just like people’s lungs, it will do reciprocating motion—extension and contraction. When the tyre reaches to a certain air pressure, it can measure the air pressure value, stabilize the air valve and let out redundant air.you don't need to pump up the bike anymore.