Here are some pics of the wheels and of tread measurements taken today:
Driver Side Front:
Tread Wheel
Driver Side Rear:
Tread Wheel
Passenger Side Front:
Tread Wheel
Passenger Side Rear:
Tread Wheel
As you can see, the fronts clearly have more tread left than the rears, but all have life left. If anyone would like some additional pictures, please let me know.