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2. Schrader valve - Wikipedia

   en.wikipedia.org/wiki/Schrader_valve

   A Schrader valve advertisement, Horseless Age, 1918 Schrader valve advertisement, National Geographic April, 1921 Schrader valve stem with valve core. There are three valves used on tires worldwide: Schrader valves, Presta valves, and Dunlop valves. Each goes by multiple names. Schrader valves are also known as American valves or car valves.

3. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   Pressure regulator or pressure reducing valve (PRV): reduces pressure to a preset level downstream of the valve; Pressure sustaining valve, or back-pressure regulator: maintains pressure at a preset level upstream of the valve; Presta valve, Schrader valve, or Dunlop valve, holds the air inside bicycle tires; Pulse valve, extremely fast pulsing ...

4. August Schrader - Wikipedia

   en.wikipedia.org/wiki/August_Schrader

   Around 1890, after reports of English cyclists' success using pneumatic tires, August Schrader saw the need for a bicycle tire valve. By 1891 he had produced the Schrader valve, which was his most popular invention and is still used today on many bicycle tires and almost all automobile, truck, and motorcycle tires. August's son, George, is ...

5. Valve stem - Wikipedia

   en.wikipedia.org/wiki/Valve_stem

   Presta valves (also called Sclaverand valves or French valves) are normally only used on bicycles. The stem has a narrower diameter (nominally 6 mm) than the thinnest (nominally 8 mm) Schrader type, and so the bore of the hole in the rim through which the stem passes can be smaller. Has a locknut that needs to be opened to inflate/deflate. [17 ...

6. Presta valve - Wikipedia

   en.wikipedia.org/wiki/Presta_valve

   A Presta valve has a nut holding the valve closed, but this is not an advantage in practice, as ordinary bicycles never go fast enough to open a Schrader valve. Further, at least some motor-paced speed record bicycles have used Schrader valves. (The actual speed of Schrader opening depends on many factors; 150 kph is only a very rough guide.

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