SM-AD91-MS Front Derailleur Clamp

DURA-ACE DI2 Front Derailleur Clamp Band Adapter - 28.6/31.8 mm

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.

• Clamp band diameter: 31.8/28.6* mm, * with multi clamp band