🚴 Bike Tubeless Presta Valve Stem Kit - Super Light Alloy - Tubeless Valve Stem with Valve Core Remover Tool & Alloy Presta Valve Stem Caps - Available in Various Sizes (Black, 44mm) Review

Looks good but doesn't hold air. Internal thread defect, tried several valve cores but they leak. At night I blew air where the tire detaches from the rim. I thought my system wouldn't take the puncture and struggled with the tire and rim all week. I decided today to find out for sure where I have a leak; large valve stem leak. Swapping cores didn't help. Disappointed, only lasted 3 weeks on one wheel but the other is holding up. For the sake of sanity I will change both, do not buy this one.

I understand there is some risk in buying a $15 valve stem kit. However, apart from looking cool, there isn't much else to say about them. Immediately after installing tubeless tires, both valve stems broke at the screw-in point of the valve. I've never had the opportunity to ride a bike. I noticed the first broken stem (photo 1) in my garage which was replaced with a pipe in the back. Preparing for the ride, I noticed another broken stem near the start of the trail (Photo 2). Luckily I had a…

I had trouble getting a full seal that included new rim tape after installation. I kept guessing the tape and repeating it a few times. I then tried stems with and without O-rings. Eventually I found that the neck of these valve stems is too wide. The Presta specification is the 6mm diameter marked on the threaded part. But right in front of the rubber stopper, they have a small gap - 6.6 mm. The hole in my rims is 6.5mm so they don't fit properly, the rubber can't be pushed into the rim of the

I hate leaving negative reviews, so I'll just state the facts and let you decide. I've been using Presta valves on both road and mountain bikes for about 40 years and have never had a break. When inflating my tire, as I have done hundreds of times before with other Presta valves, the valve body broke right where the smooth machined surface meets the threaded part (see photo). This happened when I was removing the air hose which I always pull straight up and not at an angle so as not to bend the

I bought 2 of these kits to use with tubeless gravel tire sets that I am building. While doing a dry run to check the fit of the tires on the rim and before removing the valve cores, I struggled to force air through the valves. When I tested a kit's valve stem straight out of the box and not yet installed on the rim, all I could get was a trickle of air through the valve stem. I pulled out the valve cores to look at the clog, everything moved fine but there was a slight deflection on the valve…