Derny Meaning in Cycling

A derny is a specialized motorized bicycle used to lead racers on a velodrome track. It looks like a cross between a small motorcycle and a standard bicycle. A human driver sits on the derny and pedals while the engine helps maintain a very high speed. Cyclists ride directly behind the derny to stay in its slipstream and save energy. This allows the racers to reach speeds much higher than they could achieve on their own. The driver uses their experience to gradually increase the pace throughout the race. It is most commonly used in an event called the Keirin or for specialized record attempts. The loud buzz of the motor adds a unique and exciting atmosphere to track racing. For example, a group of track cyclists follows a derny at thirty-five miles per hour during a training session. The motorized lead helps them practice high-speed handling and leg speed before their big competition. It is a classic and essential tool for professional track racing.