Can a cut on the sidewall of a tire be repaired?

[Hallie]

Tire sidewall damage cannot be repaired and must be replaced. The following describes situations where a tire cannot be repaired: Sidewall damage: The sidewall is the weakest part of a tire. Damage here increases the risk of a blowout, and repairs are difficult, so replacement is recommended. Excessive damage diameter: Foreign research institutions have issued technical guidelines based on tire characteristics, stating that if the damage diameter exceeds 1/4 inch (6.35 mm), repairing it would affect the tire's main safety structure—the carcass between the tread and the base—making repair unnecessary.