A three-wheeler is a type of vehicle that has three wheels instead of the usual four wheels found on most cars. It is also commonly known as a trike, which is a shortened version of tricycle. Other synonyms for this type of vehicle include tadpole trike, reverse trike, delta trike, and motorized tricycle. These three-wheelers are often used for transportation in areas where cars cannot easily navigate, such as busy inner-city streets or narrow, winding paths. They come in various shapes and sizes, from small and compact to large and spacious, and are used for personal leisure, transportation, and commercial purposes.