Wow so lots to consider. I have a air pump at home. I actually don't need one at work cause right across the street there is a gas station with FREE air. I'm considering the cartridge...might be my best bet as I got a flat at 5 am in the morning(still dark out). While waiting for my co workers to pick me up lots of people passing by. EERR a little unnerving. I'll check out the ones you guys suggested. Thanks!!
The gas station air will work if you have schrader valves on the tubes. It won't work with presta valves.