Currently, it's still the most widely used car tire valve but is being phased out of bike tires. The Schrader valve was invented in 1891 Trusted Source Patent Pending Blog - Patents and the History of Technology: The Schrader Valve August Schrader immigrated from Hanover, Germany, to New York in 1843. Within a few years he started a small.. First, remove the dust cap, and secondly, unscrew the brass cap. Keep in mind that the brass cap only needs to be loosened and won't completely come off, so don't force it; otherwise, you'll ruin the valve. Then insert the pump until and pump your tire to the desired level. Finally, screw the brass cap back in place and put the dust cap on.

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2. Length & Width of a Presta Valve. A Presta valve is more slender than a Schrader valve, with the average thickness only being 0.26 inches (6mm). They come in various lengths, all of which are always longer than an average Schrader valve. Length is an important factor when purchasing Presta-valved tubes.. There are three types of bike tire valve: Presta, Schrader, and Dunlop (Woods). While tubeless valves come in Presta or Schrader. Presta Valves. A Presta valves (also called "high pressure" valves or French valve) is the most common valves found on road bike inner tubes. They have a small diameter shaft and screw-on cap.