hey im new to this and i was wondering what is the best offset for 20s on my 2007 sedan just to make it flush without rubbing?

 

Are you lowered? What are the wheels widths?

I'd go with something around a +30 on a 8.5" front, and +40 on a 9.5" rear. If you are lowered and running more negative camber, you can go with slightly lower offsets.

There are a lot of other factors that will affect the "flushness" of the wheels like tire sizes, camber, and wheel width....

I would check out www.G35driver.com for some examples. This post will give you a database of all kind of fitments, and in most cases links to pictures. Link: http://g35driver.com/forums/v36-brak...ims-tires.html

I personally run a +36 / 8.5" front and +37 / 9.5" rear, and I am dropped on Eibach springs with around -1.8 degrees of camber in the front, and -1.6 in the rear. My rears are flush, but I would like to have something like a +25 in the front. For an even look on the sedan, the front needs a 10mm lower offset (assuming there is a 1" difference in wheel width like the 8.5" front / 9.5" rear).

Here's mine:

 

I'm planning to put tein s-tech. And I'm thinking 8.5 in fronts and 10.5 in rear.

 

You can always do some research yourself. Go on G35Driver.com.... they have far more information about this.