Can a patched tire be used for highway driving?

[OEloise]

This mainly depends on how many times the tire has been patched and the severity of the damage. If it has been patched 3 times or more, it should not be used on highways. The following are relevant details about tires: Precautions for tire damage: Generally, as long as the puncture on the tire's tread is less than 6mm in diameter, it can be patched. After patching, the tire can still be used for normal highway driving without safety risks. Sometimes, it's not just the surface damage that should be considered. The role of the tire's internal structure: The internal structure of the tire is what bears the air pressure and can be understood as the tire's skeleton. Therefore, for a tire, damage to the outer layer is usually not a big issue, but damage to the internal structure can lead to dangers during highway driving, posing a risk of tire blowout.