I have a set of chrome C6 GS wheels off of my 2010 GS for sale. They currently have Nitto NT01s mounted and were used for light track duty (high traffic days). Will come with 2010-2013 TPMS and center caps. Will fit C6 wide body (GS/Z06/ZR1). I believe they'll fit C7 wide body too but do your own research.
Factory wheels specs: 18x9.5 +40mm and 19x12 +59mm
Wheels are in fair to good condition. Normal wear and tear. Not perfect with minor blemishes.
Tires are stock C6/Z06 size. 275/35/18 front and 325/30/19 rear. Starting tread depth is 6.3 (1/32").
Front date codes: 4317 and 4717
Front tread depth: ~5
Rear date codes: 2215 and 2215
Rear tread depth: ~2
The front tires have plenty of street and track life left (still have tread). The rears I would avoid rain on street or track but I would not hesitate to use them on a dry track for another 3-4 days at least. Do your research. Many are of the opinion that NT01s are good down to the cords as far as grip goes. I would concur, having corded 1 pair of front NT01s. They were every bit as fast from new to cord.
Can meet within a 1-2 hour drive. Located in Rogers, AR 72758.