BWSHLF Bike tubeless Valve Stem 44MM

I love these. The attention to detail is amazing.First, the quality is good all around. The threads are precise and smooth. The grommet and O-ring are good quality with no abnormalities that affect usage. Top cap machining is excellent.While the basics of presta valve stems are the same and fit a standard, there are ways to stand out from the typical presta valve.1) The O-ring is fully captured by the tightening nut. No matter how much you tighten, the 0ring will not push out or deform thanks to the deep capture channel of the nut. The last 4 photos illustrate how well the O-ring is captured.2) The interior base is keyed for an allen wrench so you can hold the valve stem in place and torque your tightening screw down easily. See photo.3) The interior grommet is flanked by a large base. Even if you torque the tightening screw down further than you should, it is hard for the gasket to go past the base. It is almost fool proof, although I still wouldn't torque this down to the maximum. You just want to remove any play in the stem when tightening.4 )Both top caps serve as core removal tools. They fit well and make easy work of even the tightest cores. See cap photos.5) The look is amazing. I use Bontrager tires & wheels so the B logo fits perfectly.These are great valve stems. The amazing grommet and O-ring design makes these a cut above the typical stems you see. Not too mention the top caps. While they still suffer from thin and weak shafts due to the presta standard, they are the same durable as any other valves regarding the shaft. Also, these valve stems will not fix a bad tape job. They may help gloss over a mediocre tape job at the valve hole, but a bad tape job will always leak. I 10 years of daily riding, I have tried it all, and these are my favorites thus far. Prestas are not perfect, but these help elevate the platform a bit.

These valves worked great when I converted my mountain bike tires to tubeless .

These tubless valve stems are good quality and work great when I “do things right”. The problem I have is that it’s sheer chance that I “do it right”,and am plagued with airleaks around the valve stem. Accordingly, I install tubes in my bicycle tires. I purchased these stems because I occasionally try again, and again; hoping that someday I’ll learn how.

Tubeless stem fit and works great. It sealed up nicely with no leaks

Converted to tubeless using these valves and as it was my first time doing this it was a bit of a hassle. To me it seemed to make more sense to put the supplied o-ring inside the wheel but one of the product photos showed it between the stem nut and the outside of the wheel. They could have made that clearer. The valve core removal tool was useless. Thankfully my sealant injector kit from KOM had a core removal tool with it which worked well. The valves look nice so as I said, so far so good 👍