I run tubeless, so I rarely need a pump when I'm out riding, but this pump has disappointed me every time I have used it (3 times). Each time, it fills the tire with air, as expected, but when I unthread the pump it takes the valve core with it, completely deflating the tire! I thread the valve core in as tightly as possible to try to avoid this situation, but it still doesn't work. In one case, I overtightened the valve core (stripped it) and had to replace it before filling the tire. In all 3 cases, I have had to borrow a pump from another rider in order to get going again.
I am currently in search of a pump that latches onto the valve stem instead of threading on. I realize that threading provides a better seal, but I don't want to take the risk of going through that level of frustration ever again.
I have one ï¿½permanentlyï¿½ mounted on each bike, ï¿½just in caseï¿½. Yes, I do carry the much more convenient CO2 cartridges, but these are a good insurance policy. Just a couple of weeks ago proved to be worthy. Make sure to select the right product (high pressure or high volume) for you tiresï¿½ size.
This is really nicely constructed, the feel of it in my hands suggests a much heavier pump, but it is really lightweight. About 38CCs of air per pump (24mm bore, 85mm stroke). It's actually 150mm long not 140. The cage attachment has two clips and a really strong velcro strap. It's not going anywhere mounted on a bike frame, but it's small enough to pop into just about any bike bag (measure first).
I now carry this with me every gravel ride, its compact light and will pump up a 38mm tubeless to get you home. I like the detachable hose concept, makes it much easier to get on the valve. takes roughly 4-5 strokes per psi best pocket pump i have owned.