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Two wheel drive or 2WD describes vehicles with a drivetrain that allows two wheels to receive power from the engine simultaneously.

Four wheeled vehiclesEdit

For four-wheeled vehicles, this term is used to describe vehicles that are able to power at most two wheels, referred to as either front or rear-wheel drive. The term 4x2 is also used, to denote four total wheels with two being driven.

For vehicles that have part-time four wheel drive, the term refers to the mode when 4WD is deactivated and power is applied to only two wheels.

Two-wheeled vehiclesEdit

For two-wheeled vehicles such as motorcycles and bicycles, the term is used to describe vehicles which can power the front as well as the back wheel. The term 2x2 is also used to denote two total wheels with both being driven. 2x2 vehicles are typically either mechanically driven via chain or shaft or are hydraulic driven. This scheme greatly improves offroad performance, but is quite complicated and requires more power to operate, thus most 2WD machines are either "exotic" bikes for enthusiasts or created with special uses in mind.

Manufacturers who have one in production include Rokon and Christini. Manufacturers who are working or have worked on a prototype include ZID, Suzuki, Yamaha, KTM and Honda.

Two-wheeled drive with sidecarsEdit

For three-wheeled vehicles such as motorcycles with sidecars, the term is used to describe vehicles which can power the sidecar as well as the back wheel. Sidecar drive vehicles are typically mechanically driven via a shaft and may or may not have a differential. This scheme greatly improves offroad performance, but is more complicated and requires more power to operate, thus most 2WD machines are vehicles created with special uses in mind such as trials or military use. The first use of sidecar drive appears in 1928 with the apparent independent invention of Baughan in the UK, and Mokharov in the USSR.[citation needed]

References / sourcesEdit

External linksEdit

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