SRAM XX1 Type 2.1 1x11 Speed Rear Derailleur

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From the Manufacturer

With its "horizontal parallelogram" design and pulley offset, X-HORIZON keeps the chain gap constant across all 11 gears, providing fast, precise shifts. By limiting all movement to the horizontal axis, this design is faster, reduces shift force and eliminates ghost shifting. ROLLER BEARING CLUTCH™ technology reduces bounce and chain slap. CAGE LOCK technology makes wheel removal and installation easier than ever before. Paired with the XX1 shifter, the X-HORIZON rear derailleur forms the backbone of X-ACTUATION technology for unbelievably smooth shifting action.


  • X-HORIZON design reduces shift force, ghost shifting and chain slap
  • 12-tooth X-SYNC pulley wheels
  • Large upper pulley offset automatically adjusts chain gap
  • Ceramic bearings
  • Carbon cage


  • Cage - Long
  • Cable pull ratio - X-actuation
  • Speed - 11s
  • Cage material - Carbon
  • Pulley bearings material - Ceramic
  • Max tooth- 42
  • Weight - 245g


  • Cage lock 
  • Roller bearing clutch
  • X - Actuation
  • X - Horizon
  • X - Sync
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11 Speed
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SRAM XX1 Type 2.1 1x11 Speed Rear DerailleurSRMXX121RD
11 Speed710845764011

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