Shimano AD17-M Front Derailleur Clamp Shim, reduces 34.9mm to 31.8mm
$2,80
Shimano
Shimano Front Derailleur Seat Tube Shims Derailleur = the size of the clamp on the front derailleur you have Frame = the size of the seat tube the derailleur plus shim will fit Front Derailleur Clamp: 31.8 (1-1/4") , 34.9 (1-3/8") Weight: 4 Ultegra FD-680