What is the normal tread depth for tires?

[MacJuliet]

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.