A motorcycle with two wheels in the back is commonly referred to as a "trike" or a "three-wheeler." It is a motorcycle that has been modified or designed with an additional rear wheel for added stability and balance. The trike configuration provides increased stability, especially during turns and at low speeds, compared to a traditional two-wheeled motorcycle. Trikes are popular among riders who may have difficulty maintaining balance on a regular motorcycle or those who simply prefer the unique styling and handling characteristics of a three-wheeled motorcycle.