The Tri-Magnum is a three-wheelerDIY project designed by Robert Q. Riley. The drivetrain is a high-CC motorcycle rear end mated to a simple steel frame which in turn mates to a VW beetle front suspension. A simple body of wood, urethane foam, and fiberglass is constructed. The vehicle's plans are the best sellers at Riley's site. The plans debuted in the February 1983 issue of Mechanix Illustrated magazine but are now available for purchase from the designer's website. Some states recognize the Tri-Magnum as a motorcycle, some as a car, and others as a specially constructed vehicle. To comply with state laws, some people have added a single motorcycle headlight in addition to the two regular car headlights.