Sram – Rear Derailleur X01DH, 7-Speed (Red) A3

The 7-speed X-HORIZON rear derailleur makes shifting smooth and reliable no matter where you ride. It eliminates vertical movement for faster shifting, reduced shift force and an end to ghost shifting.




  • Updated design of the rear derailleur incorporates our proven X-HORIZON design and new Type-3 ROLLER BEARING CLUTCH technology
  • 12-tooth X-SYNC pulley wheels
  • Large upper pulley offset automatically adjusts chain gap
  • Sealed cartridge bearings


  • Speed (RD): 7s
  • Cable pull ratio: Exact actuation
  • Cage (RD): Medium or Short
  • Max tooth: 28
  • Colour (RD): Red
  • Pulley bearings material: Steel
  • Cage material (RD): Aluminium


SRAM part reference:

RDR8128000 = 00.7518.128.000 (short cage)

RDR8128001 = 00.7518.128.001 (medium cage)

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