Roll On.
Our Titanium Tubeless Valve Stems are pretty rad. They're strong, they're light, and -gosh darn it- they look sexy. But generally speaking tubeless tires means sealant and sealant eventually means clogged valves. And over their long life, it's not unreasonable to move your valve stems from one wheelset to the next, which can take a toll on the gasket that seals against the rim bed.
Which is why we made refresh kits. Complete with four valve cores, four gaskets, and a core removal tool they are enough to refresh two bikes' worth of valve stems. After all, the last thing anyone needs is another disposable product.