Q: What is the minimum amount of tire tread allowed by the law?
A: Tires are commonly measured in 32nds of an inch. In most states, when a tire tread reaches 2/32nds (1/16th) of an inch it is legally worn out. Wear bars, which are set at 2/32nds of an inch, run from one side of the tire tread to the other. If the tread wears down to these bars, the tires need replacing. The less tire tread you have the more likely the car will hydroplane. Inspect your tires regularly to make sure they have plenty of tread.