The bicycle turns two hundred years old, and this film traces its mechanical history from wooden-framed running machines in the early 1800s to the mountain bikes and e-bikes on today's trails. Archival footage and interviews with historians and industry figures walk through the inventions that changed how the machine worked: the chain drive that freed riders from pedaling the front wheel directly, pneumatic tires, gearing systems, and eventually the suspension and frame materials that made off-road riding possible. The film argues that each of these changes did more than improve performance; they widened who could ride and how far, turning the bicycle into basic transportation for people who had never had it before. The last stretch looks at the current moment, with electrification and a renewed interest in cycling as commuting fuel, and industry leaders speaking to where battery-assisted bikes and urban cycling infrastructure might be headed next. It plays as a straightforward mechanical and social history of one machine, told through the parts that got added to it.