This is the Shimano Dura-Ace 9070 Di2 Front Derailleur Braze-On Adapter. Specially designed to be paired with the Shimano Di2 front derailleurs, this braze on adapter is reinforced to handle the extra force of electronic shifting and is finished to match your derailleur perfectly.
- SM-AD90-MS: 28.6mm/31.8mm
- SM-AD90-L: 34.9mm
This product was added to our catalog on July 29, 2014