Run your deep section rims tubeless with Stands NoTubes Valve Extenders. This pair of 40mm effective length threaded valve extensions is designed for use with removable valve core presta valves. Allows deep section rims to be converted to tubeless use by way of external threads for securing the presta nut. The only externally threaded valve extenders on the market.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Mfg PartNum: AS0034
Really like these overall. I'm using them for extending latex tube valves for my deep carbon rims, and I like that they're threaded so I can use a valve nut to prevent them rattling around. I do have an issue with one of them, where air flow is heavily restricted for some reason. Tried it with a few different tubes and valve cores, so I know the extender is the problem. When it's not installed air moves through fine, so it must be something with how it engages the valve or core, like a thread or o-ring messed up. Only knocking one star off for that, figure it's probably a fluke, and even though it makes inflating that tire a bit of a hassle it doesn't prevent me from doing it.