The four numerical values assigned to a specific disc model by its manufacturer represent its intended flight characteristics. These values typically describe speed, glide, turn, and fade. For example, a disc with values of 13, 5, -1, 3 would be considered a high-speed, stable-to-overstable driver.
Understanding these metrics is crucial for disc selection and predicting flight paths. Choosing a disc with appropriate characteristics for a given throw and course conditions can significantly impact performance. Historically, these standardized flight ratings have allowed for greater communication and comparison between disc models from different manufacturers, facilitating informed decisions for players of all skill levels.