I did not even notice the 3 and 4 hole pattern. That in itself explains the difference in diameter. Thanks again!
Originally Posted by dbarnes
They are different in diameter. The hole patterns also are different - front has four holes, the rear alternates between four and three holes. I don't have a Brembo BBK so I don't know if they have other rear rotor options but my guess is the front-rear designs are just different.