JACO Lightning XP Locking Presta Air Chuck for Bike Tires - 1/4" F-NPT (Open Flow) | Quick-Connect Presta Attachment for Tire Inflators (Patented)

I've had an air compressor in my shop building for decades with a line dedicated specifically to bike/car tire fills. For many years, I repurposed the universal Presta/Schrader head from an old Bontrager floor pump as my inflator chuck. This worked really well but eventually wore out, and Trek no longer makes that part. So I bought a Chinese look-alike chuck here on Amazon. That chuck never worked very well. You had to push really hard to get it to fully seat on a Presta valve, and even when it was new it would leak if you jiggled it even the slightest bit. It didn't take very long for that piece of junk to stop sealing completely, so I decided to take a chance on this JACO chuck based on the mostly glowing reviews.Wow, what a difference! This thing clips securely onto a Presta valve with almost no force needed. Even better, IT STAYS PUT AND DOESN'T LEAK! Removal is just as easy - push on the black plastic button, and the chuck pops right off with no air loss. It also rotates on its mount, making it easy to get the chuck lined up with the tire's valve. I haven't owned this long enough to speak to its durability, but it does seem solidly built.In theory, this chuck is compatible with both Presta and Schrader valves, but attaching to a Schrader valve requires unscrewing/removing the Presta head to reveal a threaded Schrader fitting where the Presta head attaches. I'm sure it's functional, but I feel like repeated removal/installation would compromise its longevity - there's a little o-ring that could get chewed up or lost during removal. Also, I don't like Schrader fittings that have to be screwed to the valve stem. The Presta feature is all I really care about, and that part of this chuck is just brilliant.Keep in mind that this chuck does not have a check valve in it. Air will flow freely in and out of the chuck in both directions. This is perfect if you're using it with a gauge-equipped inflator gun, because you can see your tire pressure the second you connect. But you can't just connect this directly to a compressor hose like you would one of those old-school gas station chucks. If you did, you'd have full pressure blasting out of the end of the chuck the second you turned on the air to the hose, regardless of whether it was on a tire or not.

Well made product. Purchased the product for my Milwaukee battery automatic pump. I’ve tried it several times and works as advertised. I found it a bit pricy but after seeing how well its made I’m good with the price.

Hooked up to my dedicated bike air tank and use a Jako inflator. Just unscrew the schrader end off the inflator and screw on this presto valve. It also converts to schrader by removing the presta head. Well designed. No leakage. Easy to use.

I bought this to use with my Lezyne floor pump, which has a screw-on presta chuck that was pain to get on and off. The Jaco lightening chuck worked fine first month or two, then I had to twist it a bit once engaged to get it to stay on, and then it wouldn't stay on at all without me holding it place while I pumped with one hand. Amazon's 30-day return was long past, but I noticed the supplier offered a lifetime backing of their product, so I contacted them with my Amazon order number, and a replacement is on the way. Outstanding customer service, and hopefully the new chuck will do its thing for a long time.

Easiest device that I’ve found for connecting and disconnecting from presta valve without draining all the air.

I've been searching for years for an air chuck that works on Presta valves. Most work for a while and then fail leaking out of the doughnut seal making them totally worthless.This one works as advertised. I use it on my ultra-light cycling tubes and they have a smaller than normal diameter Presta stem. Most chucks cannot handle them leaking everywhere making it next to impossible to get any air in above 80psi.This one is hands free and works. Awesome!If you want my half dozen other chucks, they're in my trash outside. You are welcome to them.

broke after 2 years, only used 3 times, junk

I've tried so many different pneumatic presta adapters that either wore out fast or were just crap. This JACO adapter fits perfectly, easily, and doesn't leak. Outstanding steel quality. I finally found a reasonably priced adapter that should last forever. Note, I also purchased the whole Jaco assembly.