I stopped by Wild Bill's in Irving today and browsed around a little. I came across some HPI Wheels that I thought were the right size. From there, I went to Rockwall and stopped at Hobbytown USA for some more plastic tube. There, I found some HPI tires, Falken Azenis I believe. After spending too much money, here is what I came home with, They are bigger than what I was hoping for though hopefully I can make them look right. Not quite as impressive as fully machined, or scratch built, however, It will hopefully save time and get me motivated for this thing.
The HPI wheels and tires
With the 1/12th GT500 wheels
A couple of views showing height/size difference
Finally, a couple of shots of the wheels under the body. The GT500 wheel and tire in the back, the HPI wheel in the front
One thing I have learned with model cars, more often than not, bigger wheels typically look better, not sure how I feel about the HPI wheels though. I think they are on the verge of too big.