I flatted yesterday on my way to work. Unfortunately, I broke my mini-pump a few days prior so all I had with me was a CO2 cartridge that I purchased last weekend to try out (never used one before). The CO2 cartridge worked ok, but I only got about 60 psi (it said 130 on the package). Luckily it was my front wheel, so was able to ride to work without a pinch flat. I talked to a guy while I was fixing my flat. He said that his friends that do triathalons use 2 cartridges to get to 120 psi. Is this normal? Do I need to plan on using 2 cartridges for every flat?
Just a note that I purchased a Lezyne mini pump to replace my old pump. I think I'm going to keep the CO2 cartridges to supplement the pump.