I remeber when I was a kid we had a more centered com. Between My Brother and I we had 4 pack wins a third 'cause another car came off and broke mine. And one district champ. We'll wait for the pros to chime in my guess would be as long as car is stable a more agressive com would be fine. Last year we raced on an old wood track a a girl scout race with a ~1"com and three wheels flat. Fourth wheel could have been a little to high. With no steer, the three wheelers with agressive com's would sometimes come off one of the lanes that was in poor condition.