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Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...
According to Goodyear and EPA officials "the fuel-efficient line-haul tires deliver up to 4% improved truck fuel economy, and when used with other SmartWay-qualified components, each 18- wheel tractor and trailer used in long-haul can produce savings of up to 4,000 gallons per year, or more than $11,000 annually." [59]
Firestone Tire and Rubber Company is an American tire company founded by Harvey S. Firestone (1868–1938) in 1900 initially to supply solid rubber side-wire tires [2] for fire apparatus, [3] and later, pneumatic tires for wagons, buggies, and other forms of wheeled transportation common in the era.
Tractor trucks were used to tow semi-trailers up to 37,500 lb (17,000 kg) with 15,000 lb (6,800 kg) on their fifth wheel. Semi-tractor/trailers have to stay on relatively flat ground, and are not rated for full off-road use. On improved roads they could tow up to 55,000 lb (25,000 kg) with 25,000 lb (11,000 kg) on their fifth wheel. [7] [14]
The combination of a semi-trailer and a tractor truck is called a semi-trailer truck (also known simply as a "semi-trailer", "tractor trailer", or "semi" in the United States). [1] A large proportion of a semi-trailer's weight is supported by a tractor unit, or a detachable front-axle assembly known as a dolly, or the tail of another trailer ...
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