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Komatsu Loader Differential in Portland - aiming to locate OEM or aftermarket Loader Attachments which can be delivered very quickly. Our professional Portland staff of parts experts are waiting to help you purchase the components you're after. The term "pneumatic" comes from the Greek word for "spirit" that is "pneuma" and means anything that is filled with air. The majority of tires you see or utilize these days are more than likely pneumatic tires. Actually, nearly all modern commercial transportation and private vehicles could not work without utilizing pneumatic tires. Pneumatic tires as defined by Webster's online dictionary are described as tires which are made from reinforced rubber, holding compressed air. Any type of tire that needs air pressure to hold its shape is considered to be a pneumatic tire. John Boyd Dunlop, the Irish surgeon has been credited to inventing the pneumatic tire. He developed the first practical pneumatic bicycle tire during the year 1888. During the year 1895, the Michelin brothers Édouard and André, the Michelin brothers were the first to use pneumatic tires on a car during a race. Pneumatic tires are made from many bands of corded or plys fabric. Plys are normally coated with rubber which enables them to hold air pressure. Bias ply tires have the plys overlaid at a certain angle to the other layers. Radial tires have all plys laid at ninety degrees to the tire body or casing. In tube tires, there are a kind of rubber inner tube to be able to hold the air pressure. Motorcycle tires on spoke rims, bicycle tires and car tires and older bias ply truck utilize inner tubes. Tubeless tires have a stiff bead on the edges of the sidewall that creates an airtight seal with the wheel. This type of tire does not need an inner tube.