Wheels Manufacturing Shim for 1-1/8" Derailleur on 1" Seat Tube. Derailleur shims for adapting front derailleur clamps to a different sized frame seat tube.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
- TECH SPECS
| Front Derailleur Clamp | 25.4 (1") |
| Front Derailleur Clamp | 28.6 (1-1/8") |