Mechanical Speed Gauges

A speedometer shows instantaneous wheel/vehicle speed in km/h or mph so the driver can stay within limits. An odometer records total distance in kilometres or miles. A trip odometer records a resettable journey distance-for example a day’s run or distance since fill-up. Speed and distance often share one case and one cable input from the gearbox, but they are two functions: a mechanical speedometer with odometer, or a mechanical speedometer with odometer and trip odometer. The instruments need no electronic sender interface. The dial is easy to read. If a unit fails, replacement is typically a single gauge rather than a full instrument cluster.