
You do not need to replace two tires if one tire is blown out. Generally, it depends on the condition of the other tire. If the other tire has been used for less than a year or 10,000 kilometers, there is no need to replace both. However, the air pressure of the new tire should differ from that of the old tire to prevent the vehicle from pulling to one side. Additionally, the tire brand and tread pattern should be as similar as possible. Below are the functions of car tires: Supporting the entire weight of the vehicle: Car tires bear the full weight of the vehicle, withstand the load, and transmit forces and moments in other directions. Enhancing vehicle performance: Car tires transmit traction and braking torque to ensure good adhesion between the wheels and the road, improving the vehicle's power, braking, and off-road capabilities. They also work with the suspension system to absorb shocks and dampen vibrations during driving. Preventing early damage to vehicle components: Car tires protect vehicle parts from severe vibrations and early damage, adapt to high-speed performance, reduce driving noise, and ensure safety, handling stability, comfort, and fuel efficiency.

Should I replace one or two tires after a flat? As an experienced driver, I recommend replacing both tires on the same axle. If only one tire is replaced while the others have been used for a long time with uneven wear, it can cause vehicle imbalance. For example, if a rear tire blows out and there's a significant tread depth difference between the two sides, braking distance may increase and the car could skid during turns. Especially on highways, this difference amplifies handling risks and increases accident likelihood. If tire wear exceeds recommended values, it's best to replace two tires for safety. Additionally, after installing new tires, wheel balancing is necessary to prevent premature suspension component wear. Develop a habit of checking tire pressure and wear quarterly, and rotate tires to extend their lifespan. Though it costs more, safety is priceless. I've seen many people cut corners by replacing just one tire, only to face continuous problems within days and regret it deeply.

I personally think replacing two tires depends on the specific situation. If the punctured tire is newly replaced and the other tires are still in good condition with even wear, you can try replacing just that one. However, if the tread depth difference exceeds the recommended value (usually around 3 millimeters), it's better to replace two tires to maintain balance. Asymmetric tires can accelerate wear and increase fuel consumption, so the small savings in the short term might end up costing more in the long run. If you're on a tight budget, choose a replacement of the same brand and model. In case the other tires are already old, it's most cost-effective to replace all of them to avoid repeated hassle. Tires are crucial for safety, so don't ignore risks just to save a few hundred dollars. I once tried to save money by replacing only one tire, but the car started pulling to one side, and I ended up spending extra on suspension repairs—totally not worth it. Regularly check your tire condition and address any issues early to save yourself trouble.

I remember last year when I had a sudden rear tire blowout on the highway, it was quite frightening. I had someone change a new tire by the roadside, while the other tires had been used for over two years with noticeable wear. After replacing just one tire, I felt the car wobble when turning, and the brakes became less responsive. After driving for two weeks, I took it to a shop for inspection. The mechanic said the significant difference in tire tread depth had damaged the chassis. I ended up having to replace both tires on the same axle to get back to normal. From this experience, replacing just one tire can be a temporary fix, especially if the car isn’t driven much. But for long distances or frequent highway driving, it’s safer to replace two tires. Differences in tires can cause imbalance and accelerate wear on other components. After a blowout, promptly assess the wear level—if the difference is minor, you might save some money. Otherwise, safety comes first; don’t make the same mistake I did by being penny-wise and pound-foolish. Regular tire rotation can help prevent this issue.


