Tricycle

Tricycle
Modern upright tricycle
Classification	Vehicle
Application	Transportation
Fuel source	Human-power
Wheels	3
Components	Frame, Wheels, Tires, Saddle, Handlebar, Pedals, Drivetrain
Inventor	Stephan Farffler
Invented	1655 or 1680
Configurations	Delta, Tadpole
Types	Upright, Recumbent, Hand-crank, Tandem, Rickshaw, Freight, Children's, Drift, Hand and Foot, Tilting

A tricycle, sometimes abbreviated to trike,^[1][2][3][4] is a human-powered (or gasoline or electric motor powered or assisted, or gravity powered) three-wheeled vehicle.

Some tricycles, such as cycle rickshaws (for passenger transport) and freight trikes, are used for commercial purposes, especially in the developing world, particularly Africa and Asia.

In the West, adult-sized tricycles are used primarily for recreation, shopping, and exercise. Tricycles are favoured by children, the disabled, and senior adults for their apparent stability versus a bicycle; however a conventional trike has poor dynamic lateral stability, and the rider must take care when cornering to avoid tipping the trike over. Unconventional designs such as recumbents have a lower centre of gravity so require less care.