Portable Mini Air Inflator Pump with CO2 Pressure Valve for Bicycle Tire - Small Black Handheld Tool Fits Schrader and Presta Valves - Perfect Bike Accessory to Keep Tires Inflated and on The Road

Overall, it's not a bad little pump. I purchased this under the impression I could use the pump and/or the CO2 for Schrader valves, but that is not the case. Pump works for both presta and schrader style (just unscrew the end and flip the little insert around), but CO2 can only be used with presta valves. Also, there's no way to regulate the CO2 pressure, it just breaks the seal and dumps the little canister. Pump works well enough for a mini tire inflator.

Works perfectly for a road bike. Great value.

When in your hand, this is obviously a well-designed, well-made pump, a good distance above what you'll find in the bike aisle at the local discount store. I haven't used it with the CO2 but the manual pump functions smoothly and pumped the 700x25's on my road bike up to 100 psi quickly and without terrible effort on my part. I'd recommend this pump to anyone.

Great pump for a great price!!!