CyclingDeal 16g or 25g Threaded CO2 Cartridges Refills for Bike Bicycle Pump CO2 Inflator Heads - Great Refill for Mountain or Road Bikes Tires - 16g Threaded with Inflator, Pack of 5

Great product and easy to use! Worked great on my mountain bike. Plus takes us less space and zero effort compared to a hand pump. Just be aware that the cartridges become really cold when discharged.

I tested this system today to inflate 26"x1.5" tires on my commuting bike, and it worked perfectly. No adapter is needed for Presta valves. The inflator is made of metal and is of excellent quality, with significant weight savings over carrying a battery-powered pump.

Works great!!!

The inflator, itself, is well made and I liked the fact that I got cartridges and the inflator in a single kit.

I have not had to use the CO2 inflator yet, but it is great to have if you ever need it. I got this for mountain biking in the hills, where flats are always a concern and carrying a traditional pump is a pain. I now carry this pump and 2 of the CO2 cartridges in my pack, and they take up nearly no room and add almost no weight. While I hope to never have to use them on the hill, it is great to know I have them if needed.