A scene from Road Atlanta, 2007. Tires were overheating that weekend. One solution was to remove a measure of rubber from the surface of the tire--less rubber means fewer rubber molecules rubbing against each other and getting all hot and bothered and stuff. Dunlop's Jim Allen, seen here demonstrating the tire shave technique on the rear tire of a Fast By Ferracci MV Augusta Superbike, would probably explain it differently. Elraldo Ferracci stands by.
Incidentally, the April 13 edition of SoupKast contains a charming Ferracci anecdote.