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Can a Repaired Car Tire Be Used on Highways?

1 Answers

OAustin

07/29/25 3:51pm

According to maintenance standards, a properly repaired tire can be used normally and is allowed on highways if it has been repaired no more than twice. However, if the tire is not recommended for repair but is still repaired, it should not be used on highways. Below are the situations where tire repair is not recommended: 1. If the sidewall of the tire is damaged, it should not be repaired. The sidewall is the weakest part of the tire, and damage there increases the risk of a blowout. Additionally, repairing it is quite difficult, so replacement is the best option. 2. Foreign research institutions have issued technical guidelines based on tire characteristics, stating that if the diameter of the tire damage exceeds 1/4 inch (6.35 mm), repairing it would affect the main structural safety of the tire, specifically the carcass layer between the tread and the base. In such cases, repair is unnecessary. 3. If a tire has already been repaired once under standard conditions and a second damage occurs within a 90-degree angle of the first repair, repair is not recommended. 4. If a tire has been repaired twice under standard conditions and is punctured a third time, repair is again not recommended. 5. If the tire tread depth (tire thickness) has worn down to less than 2 mm, repair is not recommended.

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