Built upon 20-plus years of tubeless evolution and meticulously engineered the revolutionary. Stan’s Exo-Core Tubeless Valve delivers unrestricted sealant application and unparalleled airflow when setting up tubeless tires. Additionally the Exo-Core Tubeless Valve is easily serviceable and simple to keep clean. No longer will riders and mechanics need to worry about clogged valves and serviceability in the field or at the workbench.