So I haven't had much luck with hand pumps. Could never get the right amount of pressure in, so typically I used a motorized pump at gas stations (probably a bad idea). Sheetz around here has one with a cut off, though it only goes to 70PSI.
That in mind I knew I was going require some kind of pump with me, so I browsed Amazon for some good deals. I knew I needed something small enough to fit in a pack, light, durable and that foot pumps were out.
One thing I found was this: Genuine Innovations Ultraflate Plus
Never having used one, I took the plunge. Armed with that and a box of threaded cartriges, I gave my girlfriend's cruiser's bike tires a go, from some unknown underpressure. Managed to get it into the mid 50's with one and a half 16g cartriges (give or take). Good enough, like a hand pump, to get to a better fill station.
I will have to do a more scientific approach; haven't had time to do this. I'll have to fully deflate all three tire styles (cruiser, hybrid, mountain) at our place and see how much pressure I can get each up to with a given number of cartriges.
This device is very light weight; I could carry it and a full box of cartriges without issue in regards to weight. It's all very small and you can put them in all kinds of places in your pack. A seat bag could probably carry 5+1 in the "gun". There's a lock in case you threaded and punctured it, but you can also carry one in the body upside down because there's an outlet hole for the neck of the CO2 cartridge. Plastic feels just a bit cheap, but it is flexible rather than hard on the body, and the attachment section so far has held up.
Overall, good buy. Catridges are cheap, light.
Thoughts? Opinions? Experiences?