Just installed a squared set of g37 coupe rims which are 19X9+45 with 245/40/19 tires onto my g37x sedan

i have swift springs in my garage waiting to be installed so my question is what size spacers should i run front and rear to get as flush as possible with no rubbing issues?

 

15mm will get you a similar fit to 9.5 +35, a bit of the wheel edge outside the fender but will tuck just fine without any rubbing.
Here's the93owner w/ that setup, yours would be about 1.5mm in from his~
https://www.myg37.com/forums/19/2765...ml#post4086414