The terms refer to a tool, either a physical device or software application, used to determine the numerical relationship between the number of teeth on the driving gear and the driven gear in a small-engine vehicle, specifically those classified as “mini bikes.” For instance, a result of 3:1 indicates that the output shaft rotates once for every three rotations of the input shaft. This information is critical for understanding and modifying the performance characteristics of the vehicle.
Accurate determination of this value is essential for optimizing speed, torque, and overall engine efficiency. Selecting appropriate gearing can significantly affect acceleration, top speed, and the ability to navigate different terrains. Historically, this calculation involved manual counting of teeth and mathematical division. Modern tools automate this process, improving accuracy and efficiency, especially when experimenting with different sprocket combinations.