With its horizontal parallelogram design and pulley offset, SRAMs XX1 X-Horizon rear derailleur 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. The XX1 uses Roller Bearing Clutch technology to reduce bounce and chain slap. The integrated Cage Lock technology makes wheel removal and installation easier than ever before. The XX1 X-Horizon utilizes X-Actuation technology for unbelievably smooth shifting action.FeaturesThis XX1 rear derailleur is an integral part of the SRAM 1x drivetrain system. NO COMPROMISES.X-Horizon design reduces shift force, ghost shifting and chain slap12-tooth X-Sync pulley wheelsLarge upper pulley offset automatically adjusts chain gapCeramic hybrid bearingsCarbon cageSpecificationsColor: BlackWeight: 245gCassette Spacing: 11-SpeedCapacity: 32TMax. Cog: 42TCage Length: LongNew, Never Used, OEM, This item is exactly as pictured and does not include retail packaging.SRAM