I have an 09 G37 S I have found some wheels and I dont understand the offset difference. They are 19 x 9.5 with an offset of+ 38 offset. I don't want them to be outside of the fender. They are also not staggered but that doesn't really matter as long as they don't stick out. Any help would be appreciated thanks

 

Do you have a coupe or sedan?
If you have a sedan the fronts will be close depending on the tire size you want. If you have a coupe that offset will be fine but you need to be sure the wheels will clear the big front brakes on your S. On a 9.5" width they should clear but sometimes there's not enough clearance at the spokes.