Punctures always happen at the worst possible moment - In traffic or on an awesome downhill run. Get yourself some CO2 Cartridges so you don't waste any time while you're on the go. Get the best deal possible on our quality CO2 Cartridges when you buy in bulk. Check the pricing above for the different quantities. The more you buy, the more you save. When time is of the essence, carry a Co2 cartridge. Pumps up to 120psi in seconds.