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6×4
Type of drivetrain with 4 out of 6 driven wheels / From Wikipedia, the free encyclopedia
A 6×4 or six-by-four is a vehicle with three axles, with a drivetrain delivering power to wheels at the ends of two of them.[1] It is a form of four-wheel drive[2] but not one of all-wheel drive.
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It is the most common form of drivetrain of semi-tractors[2] and heavy haul fixed-chassis cargo trucks in larger countries such as the United States and Australia; in Europe, 4×2 and 6×2 variants are more commonplace.