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===Druckmesser===
===Druckmesser===
While an experienced thumb and forefinger, pinching a tire, can give a rough idea of the pressure, a pressure gauge is necessary to get accurate and repeatable readings. Pressure gauges are built into some bicycle pumps. Free-standing pressure gauges are of three types :
Während man mit etwa Erfahrung in den Fingern durch Zusammenkneifen mit Daumen und Zeigefinger eine grobe Idee vom Reifendruck bekommen kann, sollte jedoch ein Druckmessgerät als Notwendigkeitv erwachtet werden , um genaue und wiederholbare Ergebnisse zu bekommen. Druckmesser sind bei manchen Pumpen bereits eingebaut. Einzeln erhältliche Manometer gibt es in drei Ausführungen:


* "Pencil" gauges are the simplest and cheapest. They look like a pencil, with a fitting at one end that you can press against the valve. When you do so, a rod slides out of the other end. This rod is calibrated like a thermometer, and slides out farther the more pressure is in the tire. This type is most commonly used for Schrader valves (though Presta versions are also available.) Note that "pencil" gauges come in automotive and bicycle types. The difference is the pressure range they measure. Automotive pencil gauges commonly only read up to 50 PSI, while those intended for bicycle use run up to 120 PSI.
* "Pencil" gauges are the simplest and cheapest. They look like a pencil, with a fitting at one end that you can press against the valve. When you do so, a rod slides out of the other end. This rod is calibrated like a thermometer, and slides out farther the more pressure is in the tire. This type is most commonly used for Schrader valves (though Presta versions are also available.) Note that "pencil" gauges come in automotive and bicycle types. The difference is the pressure range they measure. Automotive pencil gauges commonly only read up to 50 PSI, while those intended for bicycle use run up to 120 PSI.
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