Let me show you the photos. There is a circle of multi-strand steel wire inside the bead, which fixes the shape of the bead. After the air pressure is full, the air pressure expands outward, and pushes against the edge and flange of the steel ring outward, forming a closed environment.

Inflated rubber tires have a cushioning effect during driving, and the general impact is absorbed. However, if it touches the steel ring and causes deformation, it will leak if it cannot be closely attached to the bead.

The problem is a little clear. Is there a wire harness in the bead? In order to strengthen the support, I guess there should be soft rubber and other materials between him and the flange of the outer steel ring?

But there is still one thing I don't understand. At present, the outer steel ring is not completely smooth (nor smooth), and there are tiny scratches on the surface (caused by processing or later). Although these small scratches are small, they will also leak electricity slightly, right?

Answer: The bead wire is covered with rubber, and the rubber is soft. The internal air pressure of 2.5 kg is enough to make the rubber stick tightly to the steel ring, and small scratches and the like will not leak.

Moreover, the shape of the bead is consistent with the shape of the steel ring, and special tools are needed for installation, so the fitting is very close.

I see. Thank you very much. 2.5 kg can achieve sealing.

But there are questions again (excuse me? ), the tire is full of air and has pressure. We can think that the pressure of gas expands outward, and the direction will be outward, towards the trend of separation of rubber tire and wheel hub. So is there a mechanism to bite rubber tires and wheels?

Or just by the shape of the flange?

Answer: This is a circle with outward force in all directions, but the bead is smaller than the flange of the steel ring, so the tire is fixed on the steel ring.