Three-wheeled cars are a weird and some would say an unfortunate phenomenon. Their intended purpose has typically been to take advantage of a loophole in tax laws which classify vehicles with three wheels as motorcycles, thus making the running costs slightly cheaper. This is a primarily British phenomenon, and it is from the UK that we get the most popular of all three-wheelers, the Reliant Robin, a car which was produced in basically the same form for several decades.
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