A tandem bike is a type of bicycle designed for two or more riders. It features two or more seats and sets of pedals, allowing multiple cyclists to ride together. The front rider, known as the captain, steers and controls the bike, while the rear rider, or stoker, assists with pedaling. Tandem bikes are popular for recreational cycling, family outings, and even competitive racing. They promote teamwork and communication between riders, as both must coordinate their efforts to maintain balance and speed. These bikes come in various styles, including road, mountain, and cruiser models.