Well, I have mine (with the 4600) geared down to 12T and it still gets too hot for my liking, even on 2s. ESC was around 145-150 and the motor is around 160. Temps would probably be better now that it's getting colder out. I know that some would say those are ok, but I like them at no higher than 140*F - I'm just funny that way (and I won't use a fan).