Tubeless conversions and valve replacements share a common requirement: the valve stem needs to seal reliably against the rim while providing easy access for sealant injection and pressure adjustments. Stan's NoTubes built the Tubeless Universal Valve Stems around those priorities, using durable brass construction with nickel plating for corrosion resistance. The extended rubber base compresses against the rim bed to create an airtight seal, while the removable valve core allows sealant injection without removing the tire or fighting with injector syringes through a standard Presta opening.

These valves fit rim valve holes between 6mm and 8mm in diameter, which covers the vast majority of tubeless-ready and tubeless-compatible rims on the market. Stan's designed them for universal compatibility across UST, TCS, TLR, and ZTR standards, and they're a direct fit for all Stan's BST rim models. That cross-platform compatibility makes them a practical shop staple whether you're setting up new wheels, replacing failed OEM valves, or troubleshooting seal issues on existing tubeless builds.

The removable valve core serves multiple functions beyond sealant access. You can thread on valve extenders for deep-section rims without the airflow restrictions that occur when stacking extenders over fixed cores. The core also allows thorough cleaning when sealant residue builds up in the valve mechanism, which happens over time and eventually restricts airflow during inflation. Pull the core, flush the stem, reinstall, and you've restored full function without replacing the entire valve.... Read More