The term 'Four-Pedal Bike' refers to a bicycle with four pedals, two for each rider. This type of bike is also known as a TANDEM bike, which is a two-person bicycle where both riders pedal in unison. The term 'TANDEM' comes from the Latin word meaning 'at length, ' referring to the two riders pedaling together. This type of bike is often used for recreational activities such as touring and racing, and can be a great way to explore the outdoors with a friend.