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Komatsu Loader Differential in Iowa - We expect next day shipping and handling on all parts and attachments for John Deere, Dresser, Caterpillar, Doosan, and a wide range of other prominent brands. We already have easy access to a large number of suppliers across the globe and can easily supply your entire new and used equipment needs. The word "pneumatic" comes from the Greek word for "spirit" which is "pneuma" and translates to something that is filled with air. Nearly all tires you see or utilize today are more than likely pneumatic tires. The truth is, most private vehicles and modern commercial transportation could not function without pneumatic tires. Webster's on-line dictionary defines pneumatic tires as tires which are manufactured from reinforced rubber and could hold compressed air. Any tire which requires air pressure to hold its shape is considered to be a pneumatic tire. The invention of the pneumatic tire has been credited to John Boyd Dunlop, an Irish surgeon, who in eighteen eighty eight developed the very first practical pneumatic bicycle tire. In eighteen ninety five, the Michelin brothers Édouard and André, the Michelin brothers were the very first to utilize pneumatic tires on a car during a race. Pneumatic tires are made from numerous bands of plys or corded fabric. Plys are normally coated with rubber that allows 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 casing or tire body. Inside tube tires, there are a kind of rubber inner tube 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 sidewall edges that creates an airtight seal with the wheel. This eliminates the need for an inner tube.