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158 Derailleur Hanger / Trek

Derailleur Hanger Number 158.

High quality CNC machined hanger by Wheels Manufacturing. 

You can find your hanger number by using the Wheels Manufacturing Finder Tool.

  • CNC machined 6061 aluminum
  • Black anodized finish
  • Attaches to frame with (2) M4x4 Socket Head Screws
  • Replaces:
    • Trek part #W303978
    • Trek part #W295979

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