Shimano Dura Ace SM-AD91
The Shimano Dura-Ace SM-AD91 is a clamp band adapter that mounts a braze-on front derailleur to frames without a braze-on hanger, with a built-in aluminum plate that stabilizes the derailleur under shifting load. It is designed for Di2 front derailleurs, works with mechanical ones too, and comes in 34.9mm or 31.8/28.6mm clamp sizes.
- For frames without braze-on hanger
- Designed specifically for Di2 derailleurs
- Also works with mechanical derailleurs
- Built-in aluminium plate stabilizes the derailleur while changing gears
- Failure to use this clamp could result in damage to the bicycle frame
Pairs well with
Shimano Dura Ace SM-AD91
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