adrians_s13 wrote:actually, Matej's s13 has 18x9.5's and is still 4 lug.
My bad. Only 0.5 inch wider. But what about the rest of the 2,5 inches?
Let me make it simple - a flush fitment (wheels don't stick out, nor are sunken in) for an S13 would be 17/18 by 9 +22/23ish offset. But since you want 50mm overfenders in rear, and 20mm up front, so the answer is here:lets say you want 9" up front, and 10 in the rear (stagerred set-up):
I will use 17's. If you want flush fitment, here's the solution:17X9+22 is flush with stock fenders. Add 20mm= 17X9+2. But there is no such wheels (unless you get them custom made or you find a pair of like one of a kind.) These are fronts.
For the rears - 50mm overfenders - 17X10-33. Again, there is no such wheels. And i don't think you could get them custom made. Also, the width comes in play. I think you should read a lot about wheel widths and offsets. Good luck.