Front Derailleur Shim

Part Number: DER-SP

$8.00 (MSRP)

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Front derailleur shim for fitting a larger clamp-on front derailleur to a smaller diameter seat tube

  • 1 shim per package
  • Machined from delrin
  • Won't mar or scratch frame

Precision Machined

Front Derailleur Shims

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Part No: Seat Tube Diameter
Derailleur Clamp Size
DER-SPC 1" or 25.4mm
1-1/8" or 28.6mm
DER-SPC2 1-1/8" or 28.6mm 1-1/4" or 31.8mm