Three-wheeler motorcycles have either a single wheel in front and two in the back, or two in front and one in the back; they operate with motors, as do cars and motorcycles, and have rear axles that resemble those in cars, along with handlebars, brakes and rear-wheel drive. Three-wheeler bikes take components and design schemes from cars and motorcycles; legally, they classify as both, and are suitable for on-road and off-road driving. These devices typically come in several shapes, which provide distinct advantages for different riding scenarios.
Three-wheel motorcycles are also called trikes, tricars and rickshaws. Most resemble cars in their engineering design, which includes a rear-mounted engine and rear-wheel drive. These vehicles are often constructed by individual owners or mechanics, and may borrow components from cars, such as engines.
As with motorcycles and cars, people can ride three-wheelers on pavement and on dirt. They can be customized for racing or off-road riding, and some come with aerodynamic designs that make them suitable for high speeds. Bikes with two wheels in the front are called "tadpoles;" their teardrop shape and low base makes them adept at making sharp turns and maintaining stability. Three-wheelers with one wheel in front, on the other hand, are more prone to tipping over.
Although many three-wheelers are homemade, some are manufactured by name brands like Harley Davidson. Harley makes the Tri Glide Ultra, which resembles a motorcycle in its sleek design, handlebars, foot rests, and elongated seat. These bikes also have headlights, handlebar-mounted controls and disc brakes.