L3-Series

I almost didn't buy this pump chuck because it was listed as a frequently returned item, and honestly, if something's going to be a dud, it's usually the thing I pick. But I'm so glad I took the chance this time!I recently bought a new bike with a Presta valve, and after a lifetime of using Schrader valves, I was completely stumped. Pumping up my tire became a frustrating ordeal. That's when I found this Jaco chuck on Amazon, and its versatility for both valve types immediately caught my eye.Despite a few reviews suggesting it was difficult to use, I found it incredibly functional. Switching between valve types was a breeze, and the quick-release feature is an absolute game-changer. I was skeptical about the quick release working since the instructions mentioned screwing it onto the valve, but I was wrong — it couldn't be easier! Jaco's patent mentioned in the product description must truly be valuable because this feature is a lifesaver.If you're struggling with different valve types, especially Presta, this chuck is a must-have.

Works great and I really like that it threads onto the presta stem especially when seating tubeless tires and you need all the air pressure you can get going into the tire. Quick release works as described.

I was sick of the cheap plastic inflator head on my air compressor tire inflator. It didn't seal well and made it difficult to set precise air pressure in my presta valve bike tires. This chuck is all metal and looked to be high quality and more durable.There is a bit of a learning curve to using it properly, but there are nice full color instructions included. Once properly screwed onto a presta valve it seals tightly and does not leak. It easily and quickly detaches when done by pulling back on the blue collar. The directions say to twist the collar on 2 or 3 turns to seal it to the valve, this is correct, but that's full turns, so more like 5 or 6 half turns when you're trying to screw it on with one hand.For the price, I wished they included some 1/4" male to barb fittings to be able to attach these to the end of a hose that doesn't already have a male 1/4" fitting. I also wish there was an option to purchase one at a time for half the price. I only needed one, but at least I have a back up now.This is probably the best tire valve air chuck design I've used so far, but it's still not perfect. You really need to screw it down tight or it will leak with slight side to side movement and you have to make sure you quickly pull the chuck straight off when you're done or it will leak. I will update this review if I have any durability issues. The only thing I can think that would wear would be the internal rubber o-rings. I have also not tried it on schrader valves, only presta.

Bought these to go with the JACO FlowPro 2.0 tire inflator and it works flawlessly. Being able to switch between schrader and presta valves with a twist of the knurled tip is an awesome feature. Air chucks and tire filler combined were still cheaper than the professional bike shop air chuck I was looking at. I could have gone even cheaper still, but the all metal construction, quick change feature and trusted brand name hooked me in. No regrets, highly recommend.

These did not work on my schader valve stems. Manufacturer reached out to me and offered full refund. Good company.

I have been using a JACO analog tire pressure gauge for years with not problems. So, when I saw the digital 200 PSIG air gauge and bike tire adaptors at such a great price, I purchased them.FRUSTRATION, FRUSTRATION and more FRUSTRATION for the get-go. First the sealing O-ring on the end of the braded hose will only seal the original Shrader fill/clip. Second the really cool chrome and blue air chucks do not grip the bike tube Pristas valves thigh enough to hold air. It's an air leak mess, impossible to fill modern bicycle tubes or tubeless tires. The sealing O-ring on the braded hose does not seal the chrome/blue P/S air chucks.Good idea but poor design and quality control. JACO you should have sent a few of these out to your valued customers to do a little testing before you gave them to the general public.P.S. I'm keeping the digital air gauge, great product, it works flawlessly on automotive tires. And with a Prestia to Shrader screw on adaptor from my local bike shop the digital air gauge/fill works great topping off my road bike tires.

I HATE Presta valves with the passion of a thousand suns - they're fussy, incompatible and weird. But I got a new bike with high-performance wheels and I have to go Presta. I have a 125 PSI air compressor in the garage, so I put this on the hose where it comes out of the air gauge. The JACO chuck is awesome! Easy switching between Presta and Schrader and the chuck immediately gives a nice tight seal. No fumbling/wavering around the valve to get a tight seal. This is obviously a well-engineered device. I hate Presta somewhat less now. My only complaint is that you have to purchase two for $30. I'd rather purchase one for $20 but even one for $30 would be worth it. If you have an air compressor and Presta valves, you're crazy not to get this.

I really wanted to like this air chuck, but alas, it just doesn't work as advertised. It is very well made and has a nice finish, and the mechanism is smooth. Unfortunately, It's difficult to seat in schrader mode and doesn't hold a seal in presta mode. It sort of works if you hold it just right, sometimes. I gave it as many chances as I could, but in the end it's just too frustrating to use Two stars are for the high quality and partial function, but it works worse than an all plastic adapter that costs 1/4 what this one costs.