Morgoth, that's your opinion. I am using a 17 right now and have not had any temp problems at all. My speed control is running at 4 lights and my motor temp actually went down when I changed to the 17 pinion. I am relaying my own experience with my motor/speed control/eco combo. Thanks for telling me how to win races, anytime you want to lay em' down and run, let me know.
Aaron D.