Originally Posted by GeorgeBMac

I can't answer the question about the CO2.

But will mention that I use a regular hand pump that I keep mounted to the downtube. The advantage is that it is always there and always "loaded" -- meaning all you have to do is pump it.

The disadvantage is that MOST of them attach directly to the valve rather than with a rubber tube like the floor pumps and, because of that, they can (frequently) rip the valve off of the tube.

But, in either case you will probably need a floor pump with a gauge as well. I fill my tires before (almost) everybody ride.