In the thread "Fitment guide" you can find your answer. Listed with the wheel widths is the range you can play between. Yes what is listed is the RECOMMENEDED offset range from DTC. Other offsets other than the ones listed could make the tire stick out past the fender or you could run into clearence problems on the inner fender. I am running a 17X8 with a 45 offset and it sits alot perfectly flush with the fender.