A drive gear is a mechanical component used in various machines and vehicles to transmit power and motion. It typically consists of a toothed wheel that meshes with another gear, allowing rotational force to be transferred from one part of a system to another. Drive gears are essential in applications like automobiles, bicycles, and industrial machinery. These gears come in different sizes and configurations, depending on the specific requirements of the system. The arrangement of drive gears can affect speed, torque, and efficiency, making them crucial for optimizing performance in devices ranging from watches to heavy equipment.