Will a non-full-size spare tire cause the car to pull to one side?
2 Answers
A non-full-size spare tire can cause the car to pull to one side. A non-full-size spare tire refers to a tire that has a smaller diameter and narrower width compared to the regular tires. When installed, the force distribution on both sides of the vehicle becomes uneven. A spare tire is essentially a backup tire prepared for the car. In case of a flat tire or any issue with any of the wheels, the spare tire allows for timely replacement, preventing the car from breaking down midway. Tires are circular elastic rubber products mounted on various vehicles or machinery, designed to roll on the ground. Typically installed on metal rims, tires support the vehicle body, absorb external shocks, maintain contact with the road surface, and ensure the vehicle's driving performance.
Last time my car had a flat tire, I put on the compact spare tire and started driving. While driving, I noticed the steering wheel kept pulling to the right, and the car kept veering slightly to one side, making the handling feel strange. It turned out the spare tire was smaller, and its grip was different from the original tire, causing the vehicle's center of gravity to become unstable. Later, I asked a mechanic, and he said this design saves space but poses significant risks for long-term use—it can accelerate tire wear, make steering more difficult, and even affect braking performance. He advised not to exceed 80 km/h and to drive straight to a repair shop to replace it as soon as possible. Since then, I always remind my friends that spare tires are only for temporary emergencies and shouldn’t be used as regular tires—otherwise, the risks outweigh the benefits. It’s also important to develop the habit of checking the spare tire’s air pressure—safety comes first.
