VeloTubes Premium Tubeless Presta Valve Stems (40mm or 55mm) - Integrated Core Removal Tool, Grommet Options - Choose Color.

I decided to try these after snapping off the thin walled OEM valve on my Roval gravel bike 25mm wide carbon wheels. The 55 mm purple VeloTubes Tubeless Valve Stem fit perfectly in the rim channel using the rectangular rubber grommet and installed easily without needing to remove the tire. It's just long enough to attach a pump. The included presta valves are good quality. The threading on the valve stems inside and outside is straight and clean. I have no issues using my track pump, air compressor or mini pump on the valves. I had no issues injecting Peaty's Holeshot Biofibre tubeless sealant using a large syringe as usual through the valves. The purple anodizing adds a nice splash of color to my otherwise drab paint scheme bike. Hopefully these prove to be more durable than the Roval valves they replaced. I will update if I have any future issues.

El producto se ve bien y funcional, solo que enviaron una tuerca que definitivamente no es para la válvula presta y mandaron una tuerca para Schrader adjunto video, una lástima porque recién la instalo y venció mi devolución. Ojalá presten más atención en sus productos.

Quality valve, you can feel it from the first time you hold it in your hand.The threaded ring can accept a spanner to tighten it properly beyond hand-tight w/o scratching the anodized surface with pliers.You need to take it a bit easier with it to transfer the sealant fluid using a syringe, as the flow is a bit restricted vs. a typical tubeless valve where the tube can go straight through. Spend a few extra seconds and you should be fine.Did the trick, matched my color scheme, would buy again.

I don't have much to compare to, but these worked out for me for my first time setting up a tubeless system. The valve cores were easy to remove and don't leak. I did have to fiddle around with the gaskets where the valve meets the rim in order to get a good seal there. I ended up using the included large gasket and that seems to be working. I've been riding on my tubeless setup for a month now with absolutely zero air loss. Will likely now buy another set for my wife's bike.

I got these and they worked great, they seal great and they look great, However I apparently hit a rock with one at a Downhill Park, and snapped it in half. But a lot of things snap in half at a Downhill Park so I guess it's par for the course. They do their job and hold air, just don't expect them to take a hit.