evo.com | Stan's NoTubes Valves > Say goodbye to that gunky, clogged up mess with the Stan's NoTubes Exo-Core Valves. These valves deliver superior airflow and unrestricted sealant application for clean, easily serviceable operation both at home and on the trail. High-Flow for Air and Sealant Oversized bore diameter ensures maximum airflow and easy sealant refresh. Self-Locking Valve Nut Captured O-ring design stays secure and will not vibrate loose. Compatible With Rim Inserts Base design allows air to flow free with or without tire inserts. Anti-Clog Design External sealing and an all-brass core eliminates clogs and ensures easy cleaning. Tool-Free Core Removal | Stan's NoTubes Exo-Core Valves 2025 - OS