Board Thread:Game Discussion/@comment-30447859-20181205210614/@comment-32545704-20181206013435

SweetBerryPie wrote: On Reddit the developers have also said that the calculation of PR doesn't account for active aero... I remember seeing that comment, it is because the calculation for PR was created before active aero was added to the game. So he also confirmed active aero was a more recent addition, although didn't say exactly when.