Jeff, Awhile back I was driving about 45 mph next to a Mustang and it sounded like a 4x4 .When we pulled up to the red light looking at his tires the tread pattern seamed to be that of the Vredenstein's.
With the Invo's you can a least rotate from one side to another, I don't think that is possible with the Vredenstein's. But they certainly have a unique tread design.
Bill,