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.

Features:

• 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

Specifications:

Speed: 11
Cable pull ratio: X-Actuation
Cage: Long
Max tooth: 42
Colour: Black
Pulley bearings material: Ceramic
Cage material: Carbon
Drivetrain Configuration: 1x
RD Minimum (Cassette): 42
Shift Technology: X-Actuation
Chain Technology: 11 Speed Powerchain
Weight: 245g

SKUs
Vendor Item # 00.7518.061.000
Model ID: RD-XX-1-A2