After changing a few flats in the middle of the desert as the temps approached 105, and pumping the little frame pump like a maniac as sweat dripped off my face like a waterfall, I bought a CO2 pump-Ultra-inflate. I use the frame pump to get the tube started, then use the CO2 when it's in place. After my mountain biking friends saw how quickly I changed my flats after that, they went out and bought one, too. I buy the small cartidges at Walmart; for a box of twelve, they end up being about $.50 each. It usually takes 1 and 1/2 or two cartridges to get to the level of pressure I want. With the road bike, it's always two cartridges. I now use slime tubes for the mountain bike, and can go months without having to change a tire, which is amazing considering all the cactus on the trails around here. Last week I had a slow leak and decided that after a year on that tube, it was probably time to change out the tube. I found about 10 thorns in the tire besides the goathead hole that finally caused me to change the tube. That's 10 flats that the slime fixed. How can you beat that? I asked the LBS one time about slime tubes for road bikes, and the guy told me that when they flat with 110 lbs. of pressure, they make a bike mess, so not many people use them. Well, I had a major blow-out once with the mountain bike, and the bike and I looked a bit like something out of Ghostbusters, so I've never used them on the road bike. With CO2, changing a tire is really quick. You'll never regret the purchase!