Pneumatic Tires
Most tires used in modern times are considered to be pneumatic tires. The use of rubber in tires enabled the creation of pneumatic tires which allowed for a much more comfortable ride. The contemporary transportation system of the world completely relies on pneumatic tires.
The pneumatic tire is a durable rubber tire and is then compressed with air. Motorized vehicles like for instance airplanes, motorcycles, trucks, buses and cars all utilize pneumatic tires. Wheeled vehicles which are not motorized, like for instance bicycles, also use pneumatic tires.
History
The history of tires begins with the creation of iron bands around wooden wheels. The utilization of solid rubber in the construction of tires began in the mid-19th century. The very first patent for a successful pneumatic tire was issued in the year 1888 to Irishman John Dunlop who created an inner-tube for a bicycle tire. This was when the term "pneumatic" started to describe tires.
In 1895, Edouard and Andre Michelin made the first pneumatic tires for cars 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 founded in 1898, followed by the Firestone Tire & Rubber company in the year 1900, the second company in the US to make tires.
Function
A rubber inner tube was utilized in all pneumatic tires in the first half of the 20th century to help hold the air pressure. Tires were constructed of reinforced layers of cord or plies covered with rubber. The plies were laid on a bias or angle to define the tire's shape and strengthen it. These "bias ply" tires had a tread pattern for traction.
Modern radial tires are made with the plies running at 90 degrees across the body of the tire. They need no inner tube since the tire forms an airtight seal with the wheel. This was a creation of the Michelin company in 1948. The tires did not become widely utilized until the latter parts of the 1970s. Radial tires last longer and provide better fuel economy.