How many millimeters should the tread depth of the front tire be greater than?
2 Answers
The tread depth of the front tire should be greater than 3 millimeters. The functions of tires are: to support the entire weight of the vehicle, bear the load of the car, transmit traction and braking torque, ensure the adhesion between the wheels and the road surface, reduce and absorb vibrations and impact forces during driving, prevent severe vibrations and early damage to car components, adapt to the high-speed performance of the vehicle and reduce driving noise, and ensure driving safety, handling stability, comfort, and fuel economy. Tire maintenance methods: 1. Ensure correct tire pressure; 2. Regularly check for bulges, cracks, cuts, punctures, and abnormal wear on tires; 3. Check the tire surface for stones, nails, or other hard objects and clean them promptly; 4. Minimize exposure to direct sunlight.
A few days ago when changing tires, I chatted with the auto repair technician about this. He said the tread depth on front tires must be at least 1.6mm to pass vehicle inspection, but in actual driving, you shouldn't push it to that limit. Coming from a mountainous hometown, I've experienced firsthand during rainy days on winding mountain roads – when tread is below 3mm, you can clearly feel the steering wheel becoming floaty when crossing waterlogged surfaces, and braking distance increases noticeably. Especially for friends who frequently drive on highways, they should be more cautious – when tread drops below 3mm, it's time to consider changing tires, as front tires bear most of the steering and braking forces. There are wear indicators on the tire tread sidewalls. You can check by inserting a one-yuan coin into the grooves – if the entire outer edge of the coin is visible, it means it's time for new tires.
