Originally Posted by
ShortLegCyclist
Keep in mind that once you inflate a tire with CO2 it will seep out even quicker than air pumped in will, so you should view CO2 inflation only as a temporary measure to get you home, then evacuate whatever is left and pump up with air instead, it will last much longer than CO2.
Wait, air is 70% nitrogen. Are you saying that CO2 molecules are smaller than nitrogen atoms and therefore leak out faster? That sound HIGHLY dubious to me. In fact it sounds completely implausible. If that's not the reason I'd love to hear the mechanism behind CO2 being leakier than nitrogen.