For installing SHIMANO braze-on front derailleurs to frames requiring a band clamp, the DURA-ACE SM-AD91 is available in 34.9, and 28.6/31.8mm sizes.
SHIMANO Dura-Ace Front Derailleur Clamp Band adapter (SM-AD91-MS 31.8mm/28.6mm) (SM-AD91-L 34.9mm)
$18.00
Description
Model No: SM-AD91-MS
Series: DURA-ACE
Clamp band diameter (mm): *28.6 / 31.8
Remarks:* w/ Multi Clamp Band
Color: Series color
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Model No: SM-AD91-L
Series: DURA-ACE
Clamp band diameter (mm): 34.9
Color: Series color
