How many kilometers can a car spare tire run?

[AniyahMarie]

Non-full-size spare tires for cars should not exceed 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. 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 tire that is temporarily or permanently unusable. Non-full-size spare tires have slightly smaller diameters and widths compared to the other four tires and can only be used as a temporary replacement. They should only be used on non-driving wheels and must not exceed a maximum speed of 80 km/h. There is also a type of run-flat tire, also known as a safety tire, commonly referred to as a "run-flat tire." Compared to regular tires, run-flat tires do not lose air or lose air very slowly when punctured, maintaining the driving profile, and the tire bead remains fixed on the rim, ensuring the car can drive to a service station for a long time or temporarily stably.