Get your rims dialed for tubeless protection with the help of Stan's No Tubes Alloy Tubeless Valve Stem Pair. These lightweight alloy valve stems snugly fit up to an 8-millimeter valve hole, and come in sizes ranging from 35-to-55-millimeters in length to work with a variety of rim depths. They are compatible with most tubeless rims, and work perfectly with Stan's own BST rims. When it comes time to re-supply your sealant, the valve cores can be unthreaded for easy filling, making life a touch easier.