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Tires

Tires. Mr. Lombardi. History of Tires. The earliest tires were bands of iron (later steel), placed on wooden wheels, used on carts and wagons. History of Tires. The first practical pneumatic tire was made by John Boyd Dunlop, in 1887 for his son's bicycle. Tire Construction.

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Tires

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  1. Tires Mr. Lombardi

  2. History of Tires • The earliest tires were bands of iron (later steel), placed on wooden wheels, used on carts and wagons.

  3. History of Tires • The first practical pneumatic tire was made by John Boyd Dunlop, in 1887 for his son's bicycle.

  4. Tire Construction • Tire construction starts when raw chemical additives such as sulfur, carbon black and solvents are combined with natural and synthetic rubber. • The process takes place in a large machine called a Banbury mixer.

  5. Two Main Types of Tires • Bias Belted Tires • Have crossed layers of ply cord running diagonally (60 Deg) to the tread. • Radial Belted Tires • Radial tires have the ply cords radiate at a 90-degree angle from the bead cord

  6. Bias Ply • Old Technology • Main advantage of bias-ply tires is in its load-carrying capabilities in relation to tire size. • A smaller bias-ply tire can carry more load than a radial tire of similar size. • A major drawback is higher friction, which creates higher tire temperatures and results in faster wear.

  7. Bias Ply

  8. Radial Tire • The casing is strengthened by a belt of steel fabric that runs around the circumference of the tire. • In radial tire design, the ply cords are made of nylon, rayon, or polyester.

  9. Numbers on the Sidewall?

  10. Proper Inflation

  11. Future Of Tires? • PAX System

  12. Future Of Tires? • Tweel from Michelin

  13. The End

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