Swelling on the side of the tire When a part of the side of the tire swells out, the cord inside the tire is impacted by an external force, and several cords may break, which is very dangerous.
Concave on the side of the tire The radial direction of the side of the tire sometimes has a band-like inward depression. This is a product formed by the internal structure, there is no safety issue, and it can be used normally.