Can a Spare Tire Be Used Long-Term?
2 Answers
Spare tires cannot be used long-term. This is because there are significant differences between a spare tire and a regular tire, and the vehicle is essentially in an unbalanced state. If driven at high speeds, this can easily lead to delayed control and endanger driving safety. Spare tires are actually intended for emergency use and are not designed for long-term use. There are several types of spare tires: 1. Full-size spare tire: A full-size spare tire has the exact same specifications as the other four tires on the vehicle and can replace any temporarily or permanently unusable tire. 2. Compact spare tire (non-full-size): This type of spare tire has a slightly smaller diameter and width compared to the other four tires and can only be used as a temporary replacement. It should only be installed on non-driven wheels, and the maximum speed should not exceed 80 km/h. 3. Run-flat tire: Also known as a safety tire (run-flat tire), commonly referred to as a "puncture-proof tire," the industry directly translates it as "tire that can run when flat." Compared to regular tires, run-flat tires do not leak air or leak very slowly when punctured, maintaining their driving profile. The tire bead also remains securely fixed to the rim, allowing the car to drive for an extended period or temporarily stabilize until reaching a service station.
I've been driving for years, and the spare tire really isn't meant for long-term use. It's specifically designed for temporary emergencies, like getting you to a repair shop after a flat. Spare tires are usually smaller in size and thinner in material, aging quickly. If used as a regular tire, the handling is much worse—unstable during turns and with a higher risk of skidding in the rain. Once, I took a shortcut and used the spare tire on the highway, only for the tire to deform and nearly cause an accident. I recommend regularly checking the spare tire's air pressure, typically between 20-40 PSI, and avoiding direct sunlight when storing it. Check the pressure every six months. During routine car maintenance, take a quick look to ensure the spare is in good condition. After using it in an emergency, repair the original tire and replace it as soon as possible. Safety first—don't take risks for convenience.
