Must All Four Tires of a Car Be of the Same Model?
2 Answers
All four tires of a car must be of the same model. Below is relevant information about car tires: 1. Functions of tires: Support the entire weight of the vehicle, bear the load of the car, and transmit forces and moments in other directions; transmit traction and braking torque to ensure good adhesion between the wheels and the road surface, thereby improving the car's power, braking, and passability; work together with the car suspension to mitigate impacts during driving. 2. Tire lifespan: The lifespan of tires is related to many factors, such as climate, road conditions, driving habits, installation, maintenance, etc. According to international regulations, if the tires are used normally, they must be replaced when the tread depth wears down to 1.6 millimeters.
I have always been concerned about the safety of my car. As a driver who frequently travels with my family, I strongly recommend that all four tires must be of the exact same model. This includes key specifications such as size, tread pattern, and material. Even minor differences between front and rear or left and right tires can lead to uneven wear and performance imbalance. For example, on slippery roads, inconsistent traction can easily cause the vehicle to skid or lose steering stability, which in severe cases may endanger lives. This is especially critical for four-wheel-drive vehicles, as the differential requires high synchronization between tires. Mixing different tire models can damage the drivetrain, leading to costly repairs. I once saw a friend who temporarily used a spare tire of a different model on the highway, resulting in accelerated wear on the other tires and forcing him to spend extra money replacing the entire set. Ensuring tire consistency is not just a habit—it's a crucial safeguard for driving safety. Regularly check tire wear and specifications to avoid minor issues turning into major hazards.