Shimano Dura-Ace Di2 SM-AD91 Braze On Clamp Adaptor 28.6/31.8mm

Dura-ace Di2 moves to the next generation. It has been tested in competition by pro teams in all conditions.

Features

Shimano Di2 Component

Converts frame with no braze-on mount to accept braze-on DI2 front derailleur

Clamp fits neatly around seat tube

Available in 34.9 mm and 28.6 mm