Shimano Dura-Ace FD-R9150 Di2 Front Derailleur Braze-on Adaptor 28.6/31.8mm

Shimano Dura-Ace FD-R9150 Di2 Front Derailleur Braze-on Adaptor 28.6/31.8mm Shimano

Shimano Dura-Ace FD-R9150 Di2 Front Derailleur Braze-on Adaptor 28.6/31.8mm

Shimano Dura-Ace FD-R9150 Di2 Front Derailleur Braze-on Adaptor 28.6/31.8mm

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What is the Shimano Dura-Ace FD-R9150 Di2 braze-on adaptor?

This is the braze-on seat tube adaptor for the Shimano Dura-Ace FD-R9150 Di2 front derailleur, allowing the braze-on style derailleur to mount on frames with 28.6mm or 31.8mm round seat tubes. Some frames are built for band-clamp front derailleur attachment rather than braze-on tabs, and this adaptor bridges the gap, letting riders run a braze-on Di2 front derailleur on frames that would otherwise require a clamp-on unit. A small but necessary piece of hardware for certain frame and groupset combinations.

Compatible with Shimano Dura-Ace FD-R9150 Di2 front derailleur. Fits 28.6mm and 31.8mm seat tube diameters. Verify your frame's seat tube diameter and front derailleur mount type before ordering.

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Specs

Type: Braze-on to clamp-band front derailleur adapter

Compatible Sizes: 28.6mm, 31.8mm seat tubes

Compatible Derailleur: Shimano Dura-Ace FD-R9150 Di2

Mount Type: Clamp band adapter

FAQ

What does the braze-on adapter do?: The adapter converts a braze-on front derailleur mount into a clamp-band mount, allowing braze-on derailleurs to be installed on frames without a braze-on tab. The adapter is supplied to fit either 28.6mm or 31.8mm seat tubes.

Is this adapter compatible with all Shimano braze-on Di2 derailleurs?: Yes. This adapter is designed specifically for Shimano braze-on Di2 front derailleurs. It is not compatible with mechanical front derailleurs or non-Shimano braze-on systems.

How do I know which size to use?: Confirm both diameters are supported. The adapter accommodates 28.6mm or 31.8mm seat tubes. Always verify your frame's seat tube diameter before installation.

Best For

Builders mounting a Shimano Dura-Ace FD-R9150 Di2 braze-on front derailleur to a frame requiring a 28.6mm or 31.8mm clamp band adapter.

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