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The difference between Radial tyre and Bias tyre

Difference between radial tire and bias tire

The difference in the direction of the cord arrangement
Ø Diagonal tire: The layers of the carcass cord are arranged to cross each other in a mesh shape and form a certain angle of 35o~45o with the circumferential centerline of the crown.
Ø Radial tire: The layers of the carcass cord are arranged in parallel with each other in a radial direction, at an angle of 90o to the circumferential centerline of the crown. The stress caused by the internal pressure of the radial belt cord is not uniform over the width of the belt. Since the belt edge line is not fixed, the initial stress of this part is equal to zero, and the center part is at the maximum. As the belt layer tightens the carcass, the carcass cord stress is reduced and the crown center is minimal.
Crown difference
Ø Diagonal tire: The buffer layer only serves as a buffer for dispersing external impact. Good roads such as highways can be used. Only withstand 10% to 20% stress. (commonly used fiber material as a buffer layer)
Ø Radial tire: The role of the belt is to restrain the circumferential deformation of the carcass. The angle of the steel cord is close to the circumferential direction, forming an angle of about 12o~25o with the circumferential centerline of the crown. Since the belt cords are arranged almost circumferentially, the length thereof is practically constant, and therefore, the belt layer can determine the shape of the tire and the initial stress caused by the internal pressure in the tire component. Withstand stress of 60% to 75%.

1) The grounding area is large, the adhesion performance is good, the tread slip is small, and the unit pressure on the ground is also small, so the rolling resistance is small and the service life is long.
2) The crown is thicker and has a hard belt layer, which is not easy to pierce; the deformation during driving is small, and the fuel consumption can be reduced by 3% to 8%.
3) Because the number of plies is small and the sidewall is thin, the radial elasticity is large, the cushioning performance is good, and the load capacity is large.
4) Good heat dissipation performance, can adapt to high temperature and high speed driving.

Because the sidewall is thinner, the crown is thicker, and a crack is likely to occur in the transition zone between the sidewall and the sidewall. The lateral deformation is large, resulting in poor lateral stability of the automobile, high manufacturing technology requirements, and high cost.
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