The topeak is a great pump! It's the only one that's easy to use and puts as much air in your tire as you want. That said, I don't carry one............ I don't like how it looks on the bike. So I use the CO2 inflator. I carry at least two cartridges, sometimes three. Plus a spare tube, plus a patch kit. You just never know........ I've had a bad year for flats so far. Four already. I've used the co2 cartridges and had no problem. Put it on, pushed the knob and whoosh! The tire is full. I do not use them when I go off-road. I have a mini-pump that I carry in my camelbak. Plus slime in my tires so flats are very rare.

Flats are a fact of biking life. It's best to be prepared.

annie