i have stock 18x8 +30 offset oem G35 rims on my Z. Im getting an alignment next monday and im debating on what size wheel spacers i should get. i was thinking about 15mm all around or should i go with something else?

 

For stock G35 wheels you can get away with 25mm all around.

 

when you get some spacers..post up pic's..i would say 25mm