Tire Help
 

I now have my wheels...(for my 12th scale camaro) And it is time to create the Tires. The rear wheels if they were full size would be 20/11. Actually if you were to figure it exact, they would come out to 20.7/11. I know it sounds big, but more often than not, on scale models the bigger wheels look more to scale than what would normally be ran. I wan't this thing to be as realistic as possible. I am needing some help with profiles, and the actual height. I don't have a specific one in mind, just wondering what would normally be run on a tire/wheel combo like this and what is available. I am more interested in tires that have "square block tread" nothing with elaborate curves, as this gets hard to recreate.

Thanks in Advance
Russell