How Many Kilometers Can a Car Spare Tire Run at Most?
3 Answers
Car non-full-size spare tires should not exceed a total mileage of 50 kilometers. Car spare tires are generally divided into full-size spare tires and non-full-size spare tires. Full-size spare tires are the same size as regular tires and have no mileage restrictions, but they must be driven at lower speeds. Below is relevant information about car spare tires: 1. Full-size spare tire: The specifications of a full-size spare tire are exactly the same as the other four tires on the vehicle, and it can replace any one tire that is temporarily or already unusable. 2. Non-full-size spare tire: The diameter and width of this type of spare tire are slightly smaller than the other four tires, and it can only be used as a temporary replacement. Moreover, it can only be used on non-driving wheels, and the maximum speed should not exceed 80km/h. 3. Run-flat tire: Run-flat tires are also known as safety tires, commonly referred to as "anti-explosion tires." Compared to ordinary tires, run-flat tires do not leak air or leak very slowly after being punctured, maintaining the driving profile, and the tire bead can remain fixed on the rim, ensuring that the car can drive to a service station for a long time or temporarily stably.
I found that the spare tire is really a temporary helper. It can run for about 80 kilometers at most, and the speed should not exceed 80km/h. I remember during a self-driving trip last time when I had a flat tire, I replaced it with the spare and drove 50 kilometers to a town for repairs. On the way, I felt the car was a bit shaky because the spare tire is smaller and has poor grip, making it prone to unstable handling over time. I even checked the manual specifically—most cars are designed this way to prevent damage to the suspension system. The spare tire's rubber is softer, and the air pressure is lower, so driving too far can accelerate tread wear. I recommend checking the condition of the spare tire before every long trip to ensure it hasn’t expired. After emergency use, immediately visit a professional shop to handle the original tire. Safety first—don’t overlook this detail just because you’re in a hurry.
As a daily commuter, I often encounter spare tire issues. It's recommended to drive no more than 80 kilometers and avoid excessive speed. Once I used the temporary spare for a short business trip - around 75 kilometers in, the steering wheel started shaking noticeably. The discomfort stems from structural differences in spare tires causing uneven tire pressure, which may increase blowout risks during prolonged high-speed driving. Professionals at 4S shops always emphasize these are strictly for temporary emergency use and shouldn't exceed mileage limits. My routine practices include: keeping the spare tire compartment clean, checking proper inflation pressure after installation, and getting the main tire repaired promptly for peace of mind.
