What tool is used to measure tire tread depth?

The tire tread depth gauge is specifically designed for measuring the depth of tire tread grooves. It provides accurate and easy-to-read measurements, which are crucial for assessing the safety and performance of tires. Adequate tread depth is essential for maintaining traction, especially in wet conditions, and for preventing hydroplaning.

While calipers can measure various depths, they are not specifically designed for tires and may not be as user-friendly for this particular application. Thickness gauges might also measure the thickness of materials but are not typically used in the context of gauging tire tread. A ruler could be used in a pinch, but it lacks the specificity and ease of use that a specialized tire tread depth gauge provides. Thus, the tire tread depth gauge is the most accurate and effective tool for this task.