Originally Posted by
Koyote
Weigh a CO2 valve and a couple cartridges, and they're almost as heavy. And they'll only give you two shots.
The last photo is a CO_2 cartridge, the valve, and a micro hand pump (that weighs 60 gm itself).
For my all-road bike, I regulate the "suspension" by changing the air pressure in the tires, so the hand pump is worth the 100 gm weight penalty.