A tyre tread depth gauge is used to provide an accurate measurement of your tyre tread quickly and easily.The depth of tread on a tyre is important for the safety of your vehicle and the passengers. Low tread depth in cold-weather conditions can severely reduce grip and control. The owner of any vehicle must ensure they are driving with tyres that meets the national legal limit to avoid legal ramifications.The tread gauges are easy to use and involve manually placing the device into the tyre tread and following the instructions from the manufacturer. Analogue and digital display versions are available.