Can the sidewall of a tire be repaired?

[Joan]

The sidewall generally cannot be repaired. Car tires are mostly radial tires, mainly composed of the cord ply, steel mesh, and rubber. The cord ply consists of transverse and longitudinal cords, whose main function is to bear the load, while the rubber's main function is to seal and allow flexible deformation. The sidewall is the weakest part. If a tire is forcibly repaired, the adhesive on the sidewall may peel off due to the constant alternating deformation and recovery during rotation. If a mushroom plug repair is used, it may cause the sidewall cords to break, leading to bulging. Causes of tire sidewall bulging: 1. Caused by hard object compression leading to sidewall cord breakage; 2. Driving over potholes at high speed—you should slow down when encountering potholes on the road, otherwise high-speed impact can easily break the tire cords; 3. Mounting curbs at a small angle, which causes the weight to be concentrated on half of the tire. Note: Once bulging occurs, the tire cannot be repaired and should be replaced promptly.