Radial tires patch

Radial tires are a structural form of tires, which are different from bias tires, arched tires, pressure-regulated tires, etc. The international code name of radial tire is "R", commonly known as "steel wire tire".

The international code name of radial tire is "R". Because its carcass structure is different from bias tire, some countries call it radial tire, X tire and so on.

radial truck tire

Truck Radial Tires (2 photos)

The cord arrangement of the radial tire carcass is different from that of the bias tire. The cords of the radial tire are not arranged to cross each other, but are nearly parallel to the tire section, arranged like the meridian of the earth, and the cord angle is small, generally 0°. There is no maintenance intersection between the cords. When the tire is running, the stress around the crown increases, which will cause circumferential stretching and radial cracks in the carcass. Therefore, the buffer layer of the radial tire adopts the dealing cord layer arranged in the circumferential direction, which intersects the carcass cord angle at 90°, generally 70° to 78°, forming a rigid annular belt that can hardly be stretched, and fixes the entire tire. , To limit the circumferential deformation of the tire, this buffer layer bears 60% to 70% of the internal stress of the entire tire and becomes the main force-bearing part of the radial tire, so it is called the belt layer of the radial tire. The main stress-bearing parts of the bias tire are not on the buffer layer, and 80% to 90% of the internal stress is borne by the ply of the carcass. It can be seen that the design of the belt layer of the radial tire is very important and must have good rigidity. Multi-layer large-angle, high-strength and non-stretchable fiber materials, such as steel wire or aramid fiber, can be used.

Classification