You can purchase clamps to convert a braze on style derailleur into a clamp mounted derailleur.
What does braze on front derailleur mean.
This as the name implies is a band which clamps around the seat tube of the frame.
Braze on some frames have a front derailleur mount integrated with the seat tube and do not require a clamp those are called braze on front derailleurs.
All that means is that there is a bracket on the frame to bolt the front derailleur to rather than having a clamp around the seat tube.
Braze on an alternative to the clamp is the braze on derailleur hanger where the derailleur is mounted by bolting a tab on the derailleur to a corresponding tab on the frame s seat tube.
There are really only two types of road front derailleur mount and the band clamp type is becoming less common as the braze on can be bolted up to fit anything.
This avoids any clamp size issues but requires either a frame with the appropriate braze on or an adapter clamp that simulates a braze on derailleur tab.
So that bike has a sram braze on front derailleur.
There are really only two types of.