While I've used a Lezyne tubeless pump for years and it *mostly* worked ok, I would always come across stubborn tire/rim combos (notably with gravel or mountain bikes) that just wouldn't seat the bead.....then it would be off to the bike shop where they would mount it in a matter of seconds with this tool and compressed air. Finally decided to bite the bullet and get one (already had a small DeWalt air compressor), and it works like a champ. I've had no issues with presta or shrader valves, and removing the valve core to mount stubborn tubeless tires works very well. As an added bonus, just filled up my car tires as well....no more having to blow out my triceps pumping those up anymore. If you have an air compressor, change out tubeless tires somewhat often and have issues with mounting, you need one of these. After a few $20 trips to the bike shop to get tires mounted, it starts to pay for itself.
This is a game-changer. I've been using it for a few weeks and have only been happy with it. For the first few uses I checked it with my old, reliable analog gauge and always found it exactly right. It's so nice to get those few pounds in to make my ride perfect. I still carry a manual pump and CO2 on my ride, but am considering switching to one of these for on-bike usage, too.
This nifty little device does indeed replace most CO2 cartridges in your bag, it is NOT cheap, it is sized better than the cartridges it replaces though. I do have a friend with it that used it prior to my purchase and sang it's praises. I run tubeless and last puncture pulled it out. It (or maybe me) failed miserably. I am suspicious that the puncture, which was deep and when I later removed my tire found a sizable glass shard inside of the tire, was too great to pump the tire back to snuff given the volume and ended up using a CO2 cartridge. Alternatively, maybe I was not able to press the nozzle head onto the valve sufficiently. Moving forward I will probably use the included screw-on adapter intended for use with tpu tubes to be certain it's not a me issue.
It charges quickly and seems to maintain charge over time when not used. It's small and light and fits easily in the back pockets of my jerseys. While it doesn't inflate to 'my' 100%< at around 75PSI, it's more than effective. I love not dealing with cartridges any longer, though I carry one in my saddlebag as a backup. It does get a little warm when using, but not to a bothersome extent. Also great the other day when my tubeless setup sprang a leak and lost more air than needed to get home. I topped it off quickly and was on my way.
