Can a Repaired Tire Be Used on the Highway?
2 Answers
It is best not to drive on the highway with a repaired tire. Due to factors such as the quality of the tire repair or the aging of the patch over time, the tire may develop air leaks. If you continue to drive at high speeds without realizing this, the tire sidewall may become damaged from prolonged underinflation, leading to tire failure. Therefore, repaired tires pose certain safety risks compared to intact ones. For the sake of highway driving safety, it is generally recommended to move repaired tires to the rear wheels or use them as spare tires to minimize the potential negative impact of poor tire performance on highway safety. The following situations are not recommended for tire repair: Damage to the sidewall of the car tire: The sidewall is the weakest part of the tire. If damaged, it increases the risk of a blowout and is also difficult to repair, so replacement is recommended. Sidewall damage diameter greater than 1/4 inch (6.35 mm): Foreign research institutions have published technical specifications for tires based on their characteristics. If the damage diameter exceeds 1/4 inch (6.35 mm), the repair may affect the main structural safety of the tire, specifically the cord layer between the tread and the base. In such cases, it is recommended to replace the tire directly. The tire has already been repaired once under standard conditions: If the second damage is less than 90 degrees from the first in terms of the central angle, repair is not recommended.
As an experienced driver with years of driving experience, I often encounter tire repair issues and frequently drive on highways with such tires. The key lies in the type and method of repair: using mushroom plugs or high-quality internal patches is usually safe, but they must be applied to the center of the tread, not the shoulder, to avoid dangerous sidewall damage. After repairing, always check the tire pressure to maintain the manufacturer's recommended value. For example, before hitting the highway, I always test the repaired spot by driving slowly around a short distance to ensure stability. The age of the tire is also crucial; older tires, even if repaired, may fail or burst under high-speed and high-temperature conditions. It's advisable to keep speeds below 110 km/h on highways, avoid sudden braking or acceleration, and use a tire pressure monitor for added peace of mind. Regular visits to professional shops for balancing and wear checks can prevent risks. With careful handling, repaired tires are perfectly usable.