What Our Gearhead® Experts Are Saying: "I’ve installed a lot of tubeless systems, and this valve solves one of the biggest pain points—clogged cores. Sealant goes in easily, airflow is huge for seating tires, and the twist control lets me fine-tune pressure without fumbling. It’s one of those small upgrades that makes tubeless way less frustrating." Tubeless works best when the small details are dialed, and the Exo-Core Valve Stem 2025 makes setup and maintenance noticeably smoother. Built by Stan’s NoTubes after decades of tubeless refinement, this valve is designed to eliminate the common headaches of clogged cores and restricted airflow. Whether we’re setting up fresh tires in the garage or refreshing sealant mid-season, it keeps the process quick and clean. The oversized bore and external sealing design allow air and sealant to flow freely, even with tire inserts installed. A precision twist-and-pull cap and intuitive airflow control give us confidence during inflation, pressure checks, and micro-adjustments. It’s a purpose-built valve that quietly improves every tubeless ride we set up.