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Plies are the construction materials use to make a tire. The body ply is a sheet consisting of one layer of rubber, one layer of reinforcing fabric, and a second layer of rubber. The earliest textile used was cotton; later materials include rayon, nylon, polyester, and kevlar. Passenger tires typically have one or two body plies. They can also be reinforced with steel. Body plies give the tire structure strength. Truck tires, off-road tires, and aircraft tires have progressively more plies. The fabric cords are highly flexible but relatively inelastic.

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12y ago

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