Somewhere along the line, I ended up with a Craftsman jumper pack that has a portable air compressor built in, great idea. On my dragster ,I have an air pump on car for shifter and SLE, simply added an air chuck coupler so that I can plug a short hose on to air up tires in lanes. I had a couple of old air bag pumps off of used pickups, they work great as on board pumps, and the newer plastic ones are really light. Jim