Misappropriated, but seis drum. Since the tires of the wheelchair to 8-9 bar pressure require an almost only the way to the gas station or a correspondingly expensive Kompressort remains to create. This small hand pump, you can sometimes go "make pressure". I recommend to install check valves on the valves of the wheelchair. On the one hand you need an adapter anyway (pump = Schrader, tires = Auto Valve), on the other hand is no air lost when loosening the pump.
