From the Owner:

Check out our customer Matt with his @gmc Sierra AT4 on a set of @fueloffroad wheels. These are the Fuel style D680 Rebel in the size 18×9 offset -12 bolt pattern 6×139.7. Note these will need a set of 14×1.5mm conical seat lug nuts to properly install. If you’re looking for a similar setup feel free to contact us direct.