Shimano AD17-M Front Derailleur Clamp Shim reduces 34.9mm to 31.8mm

The Shimano AD17-M Front Derailleur Clamp Shim is designed to seamlessly reduce your front derailleur clamp size from 34.9mm to 31.8mm, allowing for a perfect fit on frames with smaller seat tubes. This high-quality shim ensures compatibility between your derailleur and frame without compromising performance or stability. Whether upgrading components or replacing parts, this shim provides a reliable solution to adapt your Shimano front derailleur to a 31.8mm seat tube frame.

• Derailleur: Refers to the clamp size on your existing front derailleur
• Frame: Indicates the seat tube size that the derailleur plus shim will fit