Truck tyre components and their functions
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Component | Material | Function |
(1) Tread strip |
Rubber compound | The tread strip must provide high wear resistance and good grip under all road conditions. Sometimes the tread strip consists of two different materials (cap and base). In that case, the base minimizes tread temperature and rolling resistance. | |
(2) Multi-ply steel belt | Steel cords embedded in rubber compound |
Enhances driving stability, reduces rolling resistance and gives the tyre its long service life. Restricts casing growth and increases the tyre’s structural strength. | |
(3) Steel casing | Steel cord | Gives the tyre structural strength and deflection characteristics, substantially enhances driving comfort. | |
(4) Inner liner | Rubber compound | Prevents diffusion of air and moisture in tubeless tyres. |
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(5) Sidewall | Rubber compound | Protects from lateral scuffing and the effects of weather. |
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(6) Bead reinforcement | Nylon, aramide, steel cord | Secures the end of the steel cord ply to the bead core. Reinforces the bead against high shear forces. |
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(7) Bead core | Steel wire embedded in rubber compound |
Ensures firm fit of the tyre to the rim. |
Materials that go into a truck tyre