John, for the limited usage you are seeking I would recommend the oilless models. I have two compressors, one designed for the car that runs off the cigarette lighter. I am on the third of these covering probably 35 years. At least one of them would have lasted longer were it not for sloppy user handling. I also have a one gallon model which I purchased primarily to work on the tank connected with our well. The one gallon has a maximum of 100 pounds pressure which is sufficient unto my needs. If you want just the tires, I'd go with the auto compressor available at many stores. If you want it to do more, I'd go with the 1 or two gallon models. Be sure it either has or with a regulator or that one is easily purchased as an add on. Mine has no regulator, a disadvantage, but the tire filler valve works somewhat as a regulator and the other nozzles can be connected to it. The simple auto-compressor that runs off the lighter is the cheapest and smallest. I am told that a model is available that runs off its own battery though I have not personally seen this one. The gallon model is more versatile but requires a power source and takes up more space. I would not travel without my auto-compressor. Spares tires and the doughnut imitation of same often lose air over time and need a sprits when replacing a recent flat. Hope this is of some help. Ron Denis
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