Review on 🚴 BWSHLF Tubeless Presta Valve Stem Kit - 40mm / 44mm, Super Lightweight Alloy, Includes Value Core Remover Tool and Valve Stem Caps - Multiple Color and Size Choices (Pair) by Bradley Stewart

These valves look great and are extremely easy to install. They also seal very well and haven't missed a single psi since they were installed on my road bike at normal tire pressures of 75psi. Valve core removal caps are nice, both types - I prefer tapered over cylindrical - and work exactly as they should, I've removed valve cores a few times with no problems. With the box, which is very well received, I removed the foam from the inside and use it to store various things. On the other hand the valves DO NOT WORK AT ALL as stated in the product description, inject sealant through them by removing the valve core, the holes are small and clog almost immediately when you start pouring the sealant (first time, when I noticed, I had to remove them, rinse thoroughly with water and blow out with my mouth to clean them from the inside). I use Muc Off sealant on all my bikes and with these valves I have to fill it before the tire bead is fully seated. I can't use the valve to do this job cleanly, I always lose some sealant and make a mess pouring out before you complete the tire installation. Update 7/12/21: I was struggling day in and day out with my street tires sliding off the rails, I thought it was tubeless tape on the inside of the rim. I even went as far as removing the entire tape and installing a new one, but the leak was still there. I analyzed what else could be causing the leak and the only thing that came to mind was a tubeless valve. I soaked the tires in soapy water, no bubbles came out of the valve stem but some came out of the rim drain hole, it must be the valve! I loosened the bead of the tire, removed the valve, smeared some teflon on the top threads and just under the top cone seal that goes in the tire, it was difficult to get back up, and mounted it on the rim. Next thing I know the leak is gone, no more bubbles coming out of the rim drain hole. The drain port is connected to the valve through the rim walls. The problem in my case was that the cone seal wasn't sealing properly on the inside of the rim and the outer o-ring wasn't sealing properly so I couldn't see any bubbles coming out of the valve stem or o-ring nut ring, but I could get through that see drain hole, and when i plugged it with my finger, the bubbles came out of the spoke holes. Again these valves look good, are well made but lack ease of use and now they just work and hold the air with teflon under the seals and o-rings that are supposed to work for just that.