A quad, also known as a Quadra cycle, is a four-wheeled vehicle based on a motorcycle. As recognized by UK law, it is a four-wheeled vehicle weighing less than 550 kg and can be driven off-road by anyone over the age of 18. Rest assured, however, that it is not allowed to drive the quads on any public road. In the 1970s, Honda began manufacturing tricycles and quads based on their motorcycles, which became modern day quads.