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Old 01-19-08 | 10:05 AM
  #33  
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Trsnrtr
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From: Central Illinois

Bikes: Trek Domane+x2, Trek Emonda

Originally Posted by 2manybikes
No, but it won't fill your tire either, unless you know exactly what to do. The pressure goes down, not up in the cold. As the cartridge emptys at room temperature they get covered with ice from the gas expansion. That's how air conditioners work.
This means that the nozzle will ice up and the co2 will not fill the tire much any way. Even at plus 25 degrees F it's a problem.
If you put the whole cartride under your coat until it is warm, and act very quickly you can fill a tire (sorta). If you are too slow it ices up. Covering it with a gloved hand helps.
I use a similar method when I have a flat in sub-freezing temps. The first thing that I do after stopping is stick a cartridge down my tights - no kidding. Then, when I'm ready to air the tire up, out comes the cart, screw it on the inflator and I've got a full tube in a couple of seconds. I've changed several flats in sub-freezing temps using CO2 without a problem.
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