Shimano SM-AD91 Di2 Front Derailleur Band Adapter, 34.9mm

Shimano SM-AD91 Di2 Front Derailleur Band Adapter

• Enables installation of Shimano braze-on front derailleurs on band-clamp frames

• Compatible with Shimano Di2 and mechanical front derailleurs

• High-quality DURA-ACE construction for lightweight strength

• Provides accurate derailleur alignment for smooth shifting

• Ideal for road bike builds and upgrades

The Shimano SM-AD91 Di2 Front Derailleur Band Adapter allows a Shimano braze-on front derailleur to be securely fitted to frames that require a band clamp mounting. Designed for high-performance road setups, this adapter delivers precise positioning and a clean, reliable installation.

Part of Shimano's DURA-ACE range, the SM-AD91 is engineered for stiffness, durability, and optimal front shifting performance. It is available in 2 sizes to suit a wide range of seat tube diameters, making it ideal for upgrades, replacements, or custom builds.

Technical Specifications:

• Product Type: Front Derailleur Band Adapter

• Mounting Style: Band clamp

• Compatibility: Shimano braze-on front derailleurs

• Seat Tube Diameter: 28.6mm/31.8mm, or 34.9mm

• Model Number: SM-AD91

A simple yet essential component, the Shimano SM-AD91 ensures your front derailleur is mounted securely and performs at its best, even on frames without a braze-on mount.