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Can a Car with a Patched Tire Drive on the Highway?

1 Answers

StKendra

07/30/25 2:47am

A car with a patched tire is not recommended for highway driving. There are two types of tire repairs: internal and external. Tires repaired externally should not be used on highways. If the tire damage exceeds 6mm, it is advisable to replace the tire directly. If the tire has been patched, it is not recommended for highway use; instead, test it on regular roads to check for any tire pressure warnings. Additionally, if the tire has a bulge, it is recommended to replace it immediately. Below are more details on why a car with a patched tire is not recommended for highway driving: 1. If the tire damage exceeds 6mm, regardless of the repair method, it is not advisable to drive on the highway. There are two main types of tire repairs: internal and external. External repairs typically involve using a rubber plug, while internal repairs include methods like cold patches, mushroom plugs, hot patches (vulcanization), and sealants. 2. External repairs are simpler and cheaper, involving inserting a glue-coated rubber plug into the puncture. As the tire moves and heats up, the plug softens, which can lead to air leakage. However, this method is less durable and may develop bubbles over time. Cars with externally patched tires are not recommended for highway use. 3. Common internal repair methods include cold patches, hot patches, and mushroom plugs. Mushroom plugs are the safest repair method, resembling a pushpin with a metal head that seals the puncture hole from both inside and outside, providing excellent protection. Therefore, tires repaired with mushroom plugs are currently the safest option and are fully suitable for highway driving. However, if the same puncture has been repaired twice, it is not recommended for highway use as a safety precaution.

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