As I understand it, in the simplest of terms and ignoring some other detail: Up to around the mid 2000s most Ducatis had front brake discs of 320mm OD, offset @9mm(depending on how you measure it) and 6 bolt mounting. ie my 2003 1000SS and 2004 M1000. After the mid 2000s most had 320mm OD, offset @15mm(depending on how you measure it) and 5 bolt mounting. ie my 2005 999. Now the point of my ramble above. Was there a bike fitted with a mid way disc? 320mm OD 15mm Offset But with a 6 Bolt mounting. Thanks
Iirc it was the fork bottom not the caliper that changed the offset the 749/999 (and 998s) calipers are a straight bolt on upgrade to bikes with the goldline (p32/34) calipers with 10mm rotor offset