Stan's No Tubes Exo-Core Tubeless Valve Stems

Yes. The base of the Exo-Core stem features specific vent holes designed to maintain airflow even when a tire insert is pressed against the valve, preventing the common issue of restricted inflation.

The tapered rubber stopper is designed to create a reliable, airtight seal across a wide variety of rim profiles. However, they are specifically designed for Presta-compatible rims.

The stems utilize an oversized bore and a unique multi-piece architecture that minimizes the surface area where sealant can pool and dry. This design allows sealant to pass through freely during inflation and maintenance.

Yes, the valve cores are removable. This makes it easy to replace the core if it becomes damaged or permanently clogged over time, extending the lifespan of the stem itself.

These stems measure 53 mm in length, which is a standard size that accommodates most mountain and gravel bike rim depths.

No, one of the key features is the ability to perform tool-free micro-adjustments. The design allows you to tune your tire pressure quickly and easily by hand while out on the trail.