Track bikes are specialized bicycles designed for racing on velodromes, which are oval tracks with banked turns. They typically have a fixed gear, meaning the pedals are always in motion when the bike is moving. This design allows for greater efficiency and speed, as there are no gear changes or brakes to slow the rider down. These bikes are lightweight and aerodynamic, often made from materials like aluminum or carbon fiber. Track bikes feature a simple design with drop handlebars and a single gear ratio, making them ideal for competitive cycling events such as the Olympics and various UCI competitions.