How Long Can a Spare Tire Last?
2 Answers
Normally stored spare tires can be used for more than 6 years, but must be replaced with a brand new one after exceeding 8 years. Below is more information about spare tires: 1. Types of spare tires: Full-size spare tires, which have exactly the same specifications as the original car tires; Non-full-size spare tires, which are slightly smaller in diameter and narrower in width compared to regular tires; Run-flat tires, a tire configuration used in vehicles capable of running at zero pressure, also known as puncture-proof tires or air-maintaining tires; Foldable spare tires. 2. Function of spare tires: A spare tire serves as a backup tire for a car, primarily to prevent the vehicle from being stranded due to tire damage.
As someone familiar with automotive details, the usable duration of a spare tire primarily depends on its type and storage conditions. If it's a full-size spare, it can serve as a regular tire for a while, but a compact non-full-size spare is only for temporary use, with a speed limit of 80 km/h, and it's best not to exceed 100 km. Tire lifespan is typically 5 to 7 years; even if the spare has never been used, the rubber naturally ages and deteriorates, becoming hard and brittle, losing elasticity. When stored in the trunk, keep it away from light and heat, as high temperatures accelerate degradation. During routine maintenance, I always check the spare tire's pressure to ensure it's within the normal range (usually around 2.5 bar), as insufficient pressure can cause unstable driving. Spare tires past their lifespan, even if they look new, should not be used, as they may rupture or lose control at high speeds.
