Shimano AD17-M Front Derailleur Clamp Shim

for use with the Specialized Aethos and Tarmac SL8. The small notch on the side of the mount allows a Shimano Di2 wire to pass through for a clean look.

Giant Advanced road bikes. (Excluding SL Models)

to allow the mounting of a front Derailleur on a frame without braze on mounts. DP0911

components on the bicycle require the same firmware version. Using Di2 components with different... Y7FH98010

for the 1999-2010 model year TCR/OCR/Rapid/Dash Bicycles. It has also been used on a number of more recent Giant bikes too. Please verify visually that your hanger matches the one pictured.