I have a question, currently contemplating on picking up a set of wheels for my 09 g37x sedan HOWEVER im worried that the size/offset might be too aggressive and light up the AWD light.

Wheels:
20x10 w/ +15 offset
tires:235-35-20

Please let advise, thanks.

 

I have the the same model, looking forward some input also.

 

You've only listed one tire size so I'm going to assume all four are equal. If that's the case you are more than fine. It's the possible difference in rolling diameter between the fronts and the rears that can cause problems with the AWD systems. If staggering the wheels, it's important to keep the rolling diameters within a certain spec (nearly identical)
The fact that you're getting bigger/wider wheels (all 4 the same size) will have absolutely NO effect on the AWD system. This will be the same situation for ALL AWD vehicles.

 

Yea all 4 are the same width. Thanks for clarifying that. I had assumed this but just wanted to make sure. Thanks.

 

The wheels will be sticking out quite a bit compared to your OEM wheels.
They'll be 30mm less offset, and another 18mm for the wider rims so you're looking about 2" (48mm) further out than you are now, tires won't matter since they'll be about as wide as the rims, and like TorrentDay mentioned, diameter is just fine. If you're not lowering your X they may be outside the fenderwells.

 

Yep, im aware of how offset works, the only thing thats kinda making me worried is the fact that ill be putting increased load on the wheel bearings because of this aggressive offset

 

Damn you're going to stretch a 235 tire on a 10 inch wheel?? Can we even fit that aggressive of a setup on the front?