Just wanted to give a heads up, I’ve noticed more and more CO2 inflators being thread on units wherein they thread onto the tube valve and then you press down. I recently bought a Silca Eolo that is set up this way. If you have one of these make sure you tighten down your valve cores on your spare tubes even if they’re brand new. I had a flat 3 weeks ago and after inflating the spare all of the c02 rushed out near the valve stem, I thought my valve stem was torn since my other spare tube worked fine. Saturday I helped a guy who somehow managed to leave his inflator at home, same thing but I caught the valve core backing out and managed to grab it before the tire went completely flat. This was a brand new tube straight from the factory.
Anyways figured I’d give a heads up since that could really leave a rider in a remote area in a shitty situation. Bad design in my opinion I guess the O-ring will last longer than the convex gasket in the press down designs and is cheaper to produce but we all know that when metal gets very cold it condenses and shrinks down hence the cores coming loose.