Hi Psycho,
I have a TAO3R, and if I don't use rims with an offset, the rear track would be significantly smaller than the fronts.
Without offset wheels, the rear wheels won't come out wide enough (making for one silly looking car).
Perhaps since you have the pro version, it is designed to run without offsets?? The rubbing isn't a problem, just that the track is too narrow in back without offsets.
Thanks