using a very technical measuring device, a penny, I've determined the following:
1. the sharp ridges that appear on a new tire are not on these
2. holding a penny with Lincoln's head into the groove, the center comes to his nose on all tires.
3. using same test as #2, the edges of what were the right front corners are flush (no ridges). However, the rest of the tire is fine.
4. using the same test as #2, the rear tires have mostly uniform wear across the width.
Note: the tires were removed because they no longer suited a track day flogging, not because they didnt suit road driving.