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Chapter1 |
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Tire Structure and Construction
Radial Tire Construction |
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Radial ply tires are manufactured with the casing reinforcement material, whether it be polyester, rayon or steel, oriented in the "Radial" direction, or perpendicular to the bead bundle on one side of the tire, straight across to the bead on the other.
Radial ply tires can have either two, three or four reinforced layers in the crown area referred to as "belts", These belts stabilize the tread area for improved wear, better fuel economy, puncture resistance, retread ability and casing durability.
1. Tread
2. Breaker
3. Carcass | | |
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| Bias Tire Construction |
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| Bias ply tires are manufactured with multiple layers of overlapping, crossed layers of reinforcing material, usually nylon or polyester. The crossed layers run at alternating angles from one tire bead to the other. This method of manufacturing tires product a tire with a "stiffer" casing. The crossed plies contribute to lateral "stiffness" and sidewall protection, but also cause higher rolling resistance, fuel consumption and heat build-up. |
| The overall industry trend is to replace bias tires with radial tires. | | | |
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