In the case of Schrader and Presta, that’s a cylindrical gasket inside the valve core; Schrader valves also feature a spring to keep it shut, while the Presta gasket is held in place by air ...

Schrader valves are significantly wider than Presta valves, the valve core is situated inside the threaded outer - in the image above, the core is the silver section inside the more golden ...

If you’ve worked on a high-end mountain or road bike for any length of time, you have likely cursed the Presta valve. This humble century-old invention is the bane of many a home and professi… ...