Have a 2011 G37 lowered on eibach springs. Currently on OEM sports and running 25mm spacers all around. The setup is good but i can probably run 10mm wider. Looking on getting new wheels. Anyone can provide me suggestion on square setup specs?

 

Well think about it, your fronts are now fitting as a 19x8.5 +18 and rear is 19x9+20.
If you want to go wider, to have the fronts stay at the same amount of poke you would run a 19x9 ~+24 or 19x9.5 ~+30. Rears you would be looking at 19x9.5 ~+26, 19x10 ~+32...with this I would look into a set of 370z Rays rears as they are 19x10 +30 and would look sick. I've seen a couple sets on my370z forum.
Since you think you have more room, you can get a little more aggressive with the offsets.

 

Be sure to give this thread a look, plenty of examples, and Venoms' plan is a good one^^^ https://www.myg37.com/forums/brakes-...post-here.html

 

a 19x9.5 with a low 20s offset would probably be your best bet.
Bassy has a great stance but I'd say get a little less aggressive and run a 265/35

 

Thanks guys i am leaning towards 19x10.5 all around with +23 and +25.