What is the normal tread depth for tires?
2 Answers
Generally, the tread depth should be greater than 1.6 millimeters. If you frequently drive on wet or slippery roads, ensure the tread depth is more than 3.2 millimeters. Below is a detailed introduction to the functions of car tires: 1. Bearing vehicle load: Supporting the entire weight of the vehicle and transmitting forces and moments in other directions. 2. Transmitting traction and braking torque: Ensuring good adhesion between the wheels and the road surface to improve vehicle dynamics, braking performance, and passability. Together with the vehicle suspension, they cushion the impact during driving and dampen the resulting vibrations. 3. Protecting vehicle components from vibrations: Adapting to high-speed performance, reducing driving noise, and ensuring driving safety, handling stability, comfort, and fuel economy.
After driving trucks long-distance for so many years, I can tell you that tire tread depth is no joke. New tires usually have 8 to 9 millimeters of depth, like the front tires I just replaced—they feel solid. The key is to replace them as soon as they wear down to 1.6 mm; otherwise, you won’t stop in time on wet roads. Last winter, I nearly had an accident on the highway because the braking distance increased significantly. Checking regularly is simple: just use a tread depth gauge or a coin in the grooves—if more than half the coin’s edge is visible, it’s dangerous. By the way, different tire types matter—winter snow tires are slightly thicker, while summer highway tires follow standard specs. Ignoring wear means faster deterioration, and replacements aren’t cheap. Safety always comes first. Make it a habit to check every quarter, and you’ll stay safe and worry-free—avoiding a lot of trouble on the road.
