Ok, I talked with Brandon and Roger Krause, and they said for racing, you want to follow the recommended rotation for "break in", then you can use them anywhere. There is a "lap line" in the tire that sometimes,....... shows up in racing and can hurt the tire.
For the street, there makes no,...difference. For most of us, our Cobras are for the street, and don't run the same wheel/tire size front & back anyway. If I raced, I'm sure I would not use the Billboards.
