Review on 🚲 Zefal Air Gizmo CO2 Bicycle Pump with Dual Cartridge Capability by Kyle Rodman

Pretty well. A few questions. First you'll probably need to remove the velcro, flip it over, and then thread it through the rubber block again before attempting to attach it to the frame. I don't know why but the way mine were packaged they were back to front. I have been using Zefal products for many years and got it right away. but someone else can slowly drive themselves crazy trying to figure out how to attach the velcro. Second, I can't understand why the little plastic thing that holds CO2 cartridges is only threaded on one side. Another hole is just a hole. I understand you need to use the CO2 nozzle on the non-threaded side. but mine just wouldn't roll tight enough without piercing the seal to leave it that way. If both sides were threaded you could still attach the nozzle (depending on the brand) and if you used it without attachment then both sides would hold the cartridges more securely. You can securely mount them to your seat post or seat tube. Others say they slide when it rains. I'm pretty sure mine will be fine.