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Pneumatic Tires

Most tires used in modern times are considered to be pneumatic tires. The utilization of rubber in tires enabled the invention of pneumatic tires that allowed for a more comfy ride. The contemporary transportation system of the world completely depends on pneumatic tires.



A pneumatic tire is a type of tire constructed of reinforced rubber and filled with compressed air. Motor vehicles such as motorcycles, airplanes, buses, cars and trucks all use pneumatic tires. Wheeled vehicles that are not motorized, like bicycles, also utilize pneumatic tires.



History

The tire began after the invention or iron bands used around wooden wheels. It wasn't until the mid-19th century that the utilization of solid rubber in the creation of tires. The very first patent for a successful pneumatic tire was issued in 1888 to Irishman John Dunlop who invented an inner-tube for a bicycle tire. This was when the term "pneumatic" started to describe tires.



Seven years later, in 1895, Edouard and Andre Michelin made pneumatic tires for a car in France. The company of the Michelin brothers was destined to become a top producer of automobile tires. The very first United States company to make tires was Goodyear Tire company established in 1898, followed by the Firestone Tire & Rubber company in 1900, the second company in the US to produce tires.



Function

For the first half of the 20th century, pneumatic tires needed a rubber inner tube in order to hold the air pressure. Tires were constructed of reinforced layers of plies or cord covered with rubber. The plies were laid on an angle or bias to strengthen it and to define the shape of the tire. These "bias ply" tires had a tread pattern for traction.



The modern radial tire has been made with plies which run across the body of the tire. They need no inner tube as the tire forms an airtight seal with the wheel. This was the Michelin's brother's invention in 1948. The tires did not become commonly utilized until the latter parts of the 1970s. Radial tires offer better fuel economy and last longer.

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