What are the precautions for car spare tires?

[OHailey]

Here are the precautions for spare tires: 1. Spare tires also have an expiration date: Tires are rubber products, and even if they haven't been exposed to wind, sun, or road wear, prolonged storage can cause aging. Generally, the 'age limit' for tires is four years. If the expiration date is exceeded, the spare tire should be replaced promptly to prevent it from becoming unusable. 2. Tires are highly susceptible to corrosion: Rubber products are most vulnerable when stored with corrosive substances. Some car owners frequently store lubricants and other oil products in the trunk. If these oil products leak and come into contact with the tire, they can corrode the tire, causing it to expand to some extent. This significantly reduces the tire's lifespan and increases the likelihood of the spare tire becoming unusable. 3. Spare tires require regular 'check-ups': Even if within the expiration period, spare tires should be taken out and carefully inspected for wear before daily trips or during maintenance. If cracks are found or the tread has worn down to the indicator line, the spare tire should be replaced immediately. Never overlook the danger of fine cracks in tires during high-speed driving. If the tire wall is thin, it's prone to blowouts, which is a significant hazard. 4. Spare tires cannot be used long-term: Car spare tires come in three types: full-size spare tires, non-full-size spare tires, and run-flat tires (also known as zero-pressure tires). Full-size spare tires match the size of the car's original tires and can serve as temporary replacements, but only for a short period. Non-full-size spare tires are smaller than the original tires and can only be used on non-drive wheels. During use, the maximum speed should not exceed 80 km/h, and the distance should not exceed 50 km. Run-flat tires are integrated into the car's wheels, allowing the car to continue driving even if a tire fails, but at a limited speed.