Take the tour ×  When you fill your tire with a CO² cartridge
you are obviously putting CO² into it. When you use a pump you
are putting air into it. Are there significant temperature
variations that may lead to poor or better performance when
using one or the other?  For instance, if you fill a tube with
CO² and another with Air at same temperature and then the
temperature rises 10°F, will one be more likely to explode than
the other? What precautions must be taken when using one vs the
other?  share|improve this question add comment  4 Answers  up
vote 13 down vote accepted  This is a debate that gets picked up
on every bicycle forum known to man (okay, that might have been
exaggerating a bit). Typically you start to ask the question
when you notice that the morning after you have used your CO2
cartridge, your tyre is ridiculously low.  By no means am I a
chemist but, as it has been explained to me, CO2 and butyl are
more soluble than N2/O2 and butyl. Most tubes are constructed
from butyl (fancy pants cycli