Abstract: The present invention is an air tank running board. The running boards are tubular and the running boards also double as compressed air tanks. Each running board is provided with a hollow interior that is sealed at one end and has a ¼ NPT threaded pipe on its opposite end that communicates between the hollow interior of the tank and the exterior of the tank. The threaded pipe of each running board is connected to a mounted manifold with regulator so that the running board tanks can be pressurized to a desired pressure. The tubular running boards can be used as steps or step structures can be added to them.