SILCA 'Hiro' Side Locking Lever Chuck | Silca Presta Chuck | Universal Schrader Chuck Attachment | Full Metal Construction | Durable and Long Lasting | Made with Carbon Steel

always used the simpler press on (brass) Silca for butyl rubber tubes up to 140 psig, but now using polyurethane tubes which seem slicker. This connector with clamp holds onto the stem 100%1

Excellent tool for the basic use of filling Presta Valve tubes/ tubeless tires. For my MTB, I use it with a Milwaukee tire inflator and it is a perfect pair. Excellent Build quality.

Works very well on TPU tube valve stem, adding significant value, but great on standard valves for tubeless setups and butyl tubes, too. No stressing stems with traditional clamp on heads, no unscrewing valve core when using screw on heads. Adjust preload, push on, turn lever, get immediate pressure reading, and pump.Easy to use, versatile, and better for valve stem health.

Bought this chuck after reading about the most expensive Chuck on the Planet and found that it is (almost) worth it's high cost. There is nothing else like it, and it really does work. Do you need it? Probably not, but if you can spare the change, it really is a game-changer when it comes to convenience and ease of use. No more fumbling around to keep a lesser chuck on the valve, this one works the first time, every time. It does take some adjustment to get it to bite on the valve stem, and the polymer seal will last a lot longer on unthreaded stems, but is easily replaceable when it wears out.

After switching to latex tubes I noticed my chuck from my silca pump would not stay on the new style valve stems. It finally annoyed me enough that I bought this new chuck for the pump. Even with the clamp, it still won't stay on the valve stems. The pump, chuck, and tubes are all Silca so they should work together well but they don't. Silca products are expensive and to my mind, not worth the bother.

I have another copy of the Hiro side-lock chuck and it is very good, easy to use and doesn't leak. However, due to someone applying the wrong bar code sticker on the box, I could never get Amazon to deliver the Hiro chuck as ordered--the standard Presta chuck was delivered instead. I returned two of them, and finally ordered Hiro chuck directly from Silca.

This works, but I had really high expectations for finding a better presta valve adapter. I bought this with the Silca floor pump, and honestly this presta valve adapter is no better than the one that ships with the pump. I still find that getting a good seal takes a little finesse, and it has a tendency to lose seal while pumping the tire. I'll give it a bit more time to see if there's a technique I need to learn, otherwise, it's going back.

Perhaps I will get better at it over time. Right now I have a hard time with one handed operation and two hands between the spokes is hard to do.