Can a Car with a Repaired Tire Drive on the Highway?
2 Answers
Tires repaired at authorized 4S stores can continue to be used. However, due to factors such as poor repair quality or aging patches over time, the tire may develop air leaks. If the vehicle continues to drive at high speeds without the driver's awareness, prolonged underinflation can cause sidewall damage, leading to tire failure. Therefore, repaired tires pose certain safety risks compared to intact ones. For highway driving safety, it is generally recommended to rotate repaired tires to the rear wheels or use them as spare tires to minimize the potential adverse effects of compromised tire performance on highway safety. The following situations are not recommended for tire repair: Sidewall damage: The sidewall is the weakest part of a tire. Damage here increases the risk of a blowout and is difficult to repair, so replacement is the best option. Tire puncture diameter exceeding 1/4 inch (6.35 mm): Research institutions abroad have released technical guidelines based on tire characteristics, stating that punctures larger than 1/4 inch (6.35 mm) affect the tire's primary safety structure—the belt layer between the tread and the base—after repair. In such cases, direct replacement is advised. Tire already repaired once under standard conditions: If the second puncture is less than 90 degrees apart from the first in terms of the angle between their centers, repair is not recommended.
I've been driving for several years and have had my tires patched multiple times, often driving on highways. In fact, a properly patched tire is definitely safe for highway use, as long as the repair is done correctly. The key lies in the method of repair—for example, an internal patch using a plug method is more reliable, while a simple external patch may not be as durable. Last time I got a tire patched, I drove around the city at low speed first to check for leaks before heading onto the highway. On the highway, higher speeds increase tire pressure and temperature, making the patched area more prone to issues, so choosing a reputable shop is crucial; it's best to avoid small, unreliable workshops. Additionally, if the tire is damaged on the sidewall or has a large puncture, it's better to replace it entirely rather than trying to patch it—don't skimp on safety. Regularly checking tire pressure and wear is also essential. Safety comes first, especially since highway incidents can be serious. Don't delay—check the tire's condition promptly after a repair.
