What type of valve is commonly found on car tires and some bicycles?

What type of valve is commonly found on car tires and some bicycles? Schrader valve.

A Schrader valve is the spring-loaded valve type widely used on automobile tires and also found on many bicycles, especially mountain bikes, children’s bikes, hybrids, and utility models. It has a relatively broad metal barrel with a removable valve core and is usually protected by a screw-on cap.

The design was invented by August Schrader, whose company developed it in the late 19th century. Its widespread use in cars made it familiar at petrol stations and repair shops, and many public air pumps are designed to accept Schrader valves directly. A small central pin opens the valve when pressed by the pump head.

The common mix-up is with the narrower Presta valve, which is especially frequent on road and racing bicycles. Presta valves use a threaded stem and a small manually loosened tip. Dunlop or Woods valves are another bicycle-valve design, used in some regions. Adaptors can allow one pump to work with different systems, but the car-tire association most strongly identifies the Schrader valve.