A tandem bicycle is a type of bicycle designed for two or more riders. It features two seats, two sets of pedals, and two handlebars, allowing multiple cyclists to ride together. The riders work in unison to propel the bike forward, making it a fun and social way to cycle. Tandem bicycles are often used for recreational riding, touring, and even racing. They can be beneficial for couples or friends who want to enjoy cycling together. Additionally, they can accommodate riders of different skill levels, as one person can take the lead while the other follows.