How to Gauge Tread Depth?
But how do I know my tread depth? There are specially designed gauges that will figure out precisely how much tread depth is left. Those tools are perfect if you must know the exact depth, but if you just want to figure out if you need to change your tires, all you need is a solitary penny. Turn the penny so Lincoln’s head is face down and put it into the tire tread. If his head is the same as the tire tread then you ought to start looking to replace your tires.