What does 'ao' on tires mean?

[DiAdeline]

Tire's 'ao' is the mark of Audi's original tires. Car tires are one of the important components of a car, which are in direct contact with the road surface and work together with the car suspension to mitigate the impact during driving, ensuring good ride comfort and smooth driving performance. They also ensure good adhesion between the wheels and the road surface, thereby improving the car's traction, braking, and passability. Car tires are generally composed of three parts: the outer tire, the inner tube, and the flap. The inner layer of the tire has a rubber layer with excellent air tightness, gradually moving towards the direction of lightweight tires. The outer tire is mainly composed of the carcass, tread, sidewall, and bead, with the carcass and bead forming the force-bearing structure of the car's pneumatic tire.