What does the DOT on tires mean?

[Scarlett]

Tire DOT refers to the certification by the U.S. Department of Transportation. The functions of tires are: 1. Supporting the entire weight of the vehicle and bearing the load of the car; 2. Transmitting traction and braking torque to ensure the adhesion between the wheels and the road surface; 3. Reducing and absorbing vibrations and impacts during driving, preventing severe vibrations and early damage to car components; 4. Adapting to the high-speed performance of the vehicle and reducing driving noise, ensuring driving safety, handling stability, comfort, and fuel economy. Methods for tire maintenance include: 1. Regularly cleaning out stones stuck in the tire treads; 2. Minimizing exposure to direct sunlight; 3. Promptly checking tire pressure; 4. Paying attention to suspension maintenance; 5. Regularly inspecting front wheel alignment; 6. Adopting careful driving habits, choosing smooth road surfaces to avoid objects that can puncture or scratch tires, and steering clear of chemical spills that may corrode tires.