Great - will follow up. I found some PACE notes for an F6 on line which says 130mm for a Mavic. We've tried the Royce 131mm that came with it and the tolerance is too close for comfort. The arm being 1-2mm away from the chain stay. Don't really want to go to 134mm if I can help it but really wanted an all MAVIC groupset as I have everything else. So what is Rich's avatar?