Originally Posted by big john

I always use co2 with the pump as a back-up. Last year I flatted on a group ride and I had to turn back alone and of course I had a second flat. I only had one tube so I had to patch. The pump made it possible for me to find the leak in the tube.

Another time I was dropped on a climb and flatted and my old co2 inflater fell apart. Luckily I had the pump.

In ancient history I always carried a Zefal frame pump. One time I knocked it off with my knee when going through an intersection. I parked the bike and started walking back to get it from the crosswalk where it landed. A woman in a car had been waiting for the green light and saw the whole thing. She looked at me and then ran right over my pump.