The tire tread depth is the measurement between the groove ... to 6/32), or red dangerous zone (0 to 3/32). The dial type gauge and digital gauge work similar to the pencil gauge — simply ...

[John] found that a digital tire tread depth gauge can work well for this application. Many of these gauges use the same electronics as the cheap digital calipers, for which the serial protocol ...

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Tread depth gauges typically come as either a pencil type, dial type, or digital type. Here's how to use the pencil/stick gauge: Calibrate the gauge by setting the base on a flat surface and ...