Simon Brooke wrote:

CO2 inflators are basically one shot - at least, they're pretty much
one shot per cartridge, and the cartridges are

(a) not light

A cartridge containing 16 grams of gas weighs 60 grams gross -- a small
amount of weight if carrying just one. Another 60 to 100 grams for a backup
pump, plus 20 grams for the actual inflator (chuck type). 140 to 180 grams
total. That's lighter than an average bog standard pump that would not work
as well.

~PB