I used to carry a Serfas mini frame pump, but gave up on it. The clamp that held the mini frame pump to the seat tube was flimsy. It allowed the pump to slip off the bike whenever I ran over the slightest bump. Also, the mini frame pump produced such a small volume of air that I could never inflate a tire hard enough to ride on. I now carry an Innovations CO2 inflator equipped with 2 CO2 cartridges in my seat bag. There is no more mini frame pump to clutter up my bike. The way I figure it, I have two "trys" at inflating a tire with the CO2 inflator. If all else fails, then I go to "plan c." I have my cell phone and will call for help.