GNX Wheel Size

Hello. I have a question about the correct wheel size & offset that were put on the GNX. I've done some research and have not bin successful with finding the correct offset for the car.

I'm told that the rear wheels are: 16x8 with a -23 offset
Tire size is 255/50/16

I'm told the fronts wheels are: 16x8 with a -15 offset
Tire size is 245/50/16

Is this correct OR is there a 0 offset for the front wheels.
Thanks
 
Correct me if I'm wrong but original GNX wheels are a two-piece design when compared with Trans am wheels which are one-piece. Also the GNX wheels don't have the "dimples" where the web meets the rim.
Claude.
 

X Ray

The GNX changed my life!
Welded GNX wheels
 

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