
A compact spare tire should not be driven at speeds exceeding 80 km/h, and the driving distance should not exceed 100 kilometers. A compact spare tire is a temporary spare that is slightly smaller in diameter and narrower in width compared to the regular tires. Compact spare tires have different speed ratings and load indexes than the vehicle's four normal tires and cannot be used as permanent replacements—only for temporary use. When driving with a compact spare tire installed, adhere to the speed limit: Since compact spare tires differ in specifications from the original tires, they are marked with speed restrictions. After installing the spare tire, drivers must strictly follow the speed limit to ensure safety. If driving on a highway, stay in the far-right slow lane and activate the hazard warning lights. The spare tire should be installed on the front axle: Regardless of the vehicle's drive axle, tires with higher speed ratings should be mounted on the rear axle to prevent potential oversteering. Therefore, the lower-speed-rated spare tire should be installed on the front axle. Compact spare tires should not be used for extended periods: Prolonged use of a compact spare tire can significantly affect the vehicle's braking performance and handling due to its substantial differences from the original tires, compromising driving safety.

Regarding how many kilometers a non-full-size spare tire can be driven, I used one once. At that time, the tire blew out, and I replaced it with the small spare tire, driving about 60 kilometers to the repair shop. The whole process was very shaky, and I didn’t dare to drive fast, keeping the speed below 80 kilometers per hour. Manufacturers generally recommend not exceeding 80 kilometers because the spare tire size differs from the original tire, and prolonged driving can cause imbalance, accelerate wear, and even damage the suspension. I was lucky that time, as no accident occurred, but the lesson is to replace the original tire as soon as possible. Also, don’t leave the spare tire unused for too long; check the tire pressure regularly to ensure it’s functional in critical moments. It’s best to stop at the nearest repair point and not consider long-distance trips.

I have quite a say in the safe usage distance of non-full-size spare tires. As a frequent driver, I know it's designed for emergencies, with manufacturers recommending not exceeding 80 kilometers. Also, don't drive too fast—limit it to 80 kilometers per hour. The reason is that the size difference can cause vehicle imbalance, increased fuel consumption, and higher risks over long distances, such as tire blowouts or loss of steering control. I suggest heading to the nearest repair shop as soon as possible after starting, without delay. Additionally, the spare tire's pressure should meet the standard, usually slightly higher than the original tire, to support temporary driving. Remember, safety comes first—don't take shortcuts by driving further.

I've used the spare tire a few times, usually only for short distances. The manufacturer says it's safe within 50-80 kilometers, with a speed limit of 80 km/h. Driving longer distances makes the car unstable and prone to accidents. It's recommended to find a nearby shop to repair the original tire.


