Can a spare tire for small cars be used on highways?
2 Answers
Spare tires for small cars can be used on highways. However, non-full-size spare tires should not exceed 80KM/h when driving on highways. Definition of a spare tire: A spare tire refers to the backup tire for a car, usually matching the specifications of the original car tires. However, some vehicles use spare tires with special-colored rims, compact spares, foldable spares, or run-flat tires to remind the owner to inspect and replace faulty tires promptly. Types of spare tires: There are three types of spare tires: full-size spares, non-full-size spares, and run-flat tires. A full-size spare has the exact same specifications as the other four tires on the car and can replace any temporarily or permanently unusable tire. A non-full-size spare has a slightly smaller diameter and width than the other four tires, making it suitable only for temporary use and only on non-driving wheels. Run-flat tires, also known as safety tires or colloquially as "anti-burst tires," are officially termed "tires that can run while flat."
I've been driving for over 20 years, and spare tires aren't something to be used casually, especially on highways—it's too dangerous. Most spare tires for compact cars are non-full-size, being smaller and narrower, which provides poor grip at highway speeds. During sudden braking or turns, they're prone to skidding and losing control. They're designed with speed limitations, typically restricted to under 80 km/h; driving faster can overheat the tire and potentially cause a blowout. Once, I saw a friend use a spare tire on the highway, and the car wobbled so badly it nearly hit the guardrail. Not to mention, prolonged use accelerates wear and increases repair costs. So, if you get a flat, it's best to drive on the spare to the nearest service station or repair shop, switch to a proper tire, and then continue—don't risk it on the highway. Safety first—a spare tire is just a temporary emergency tool.
