I'm looking to get a custom set of Fikse wheels made. I am thinking about 18x9 front and 18x10 rear on a 98 Cobra. What would be the ideal offset on these widths? I am going to run 295/35/18 rear tires and 255/40/18 fronts. I know that all manufacturers tires run a little different in actual width, but knowing this, what would the ideal offset be for the size wheels I want to run? Would a 25mm offset front and rear be fine, or should they be more like 23mm front and 25mm rear? Any advice would be much appreciated.