Wheels Manufacturing Front Derailleur Clamp Shim (1" to 1-1/8") - DER-SPC
Wheels Manufacturing Front Derailleur Clamp Shim (1" to 1-1/8") - DER-SPC, Wheels Front Derailleur Shim. Features: Allows matching odd size derailleurs to most frame sizes Specs: Adapts:25.4 to 28.6mm