How Long Can a Spare Tire Be Used on the Highway?

1 Answers
BryceRose
07/30/25 1:36am
There is no mileage restriction for using a spare tire on the highway. Definition of a Spare Tire: A spare tire refers to the backup tire for a car, typically matching the specifications of the original tires. However, some vehicles use spare tires with special-colored rims, compact spares, foldable spares, or run-flat tires to remind owners 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 identical specifications to the other four tires on the vehicle and can replace any temporarily or permanently unusable tire. A non-full-size spare has a slightly smaller diameter and width compared to the other four tires, making it suitable only for temporary use and exclusively for non-drive wheels. Run-flat tires, also known as safety tires or colloquially as "anti-blowout tires," are officially termed "tire pressure monitoring tires" in the industry.
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