This new derailleur not only answers the Eagle drivetrain’s need for greater capacity, but is also the next evolution of our proven, 1x-specific X-HORIZON design. The larger, 14-tooth X-SYNC lower pulley, allows 10- to 50-tooth cassette capacity in this compact design, and also adds to Eagle’s overall smooth-pedalling feel. Our new, Type-3 ROLLER BEARING CLUTCH features a smoother torque curve for a quieter, more consistent operation and feel. CAGE LOCK has been moved back and out of the way, protecting it from trail debris. A redesigned, robust mounting system further improves the Eagle derailleur’s performance and overall durability.TechnologyCAGE LOCKWith CAGE LOCK technology in the rear derailleur, wheel removal and installation—as well as chain installation—becomes faster and simpler. Just pushing the cage forward to create slack and lock it into place.ROLLER BEARING CLUTCHROLLER BEARING CLUTCH rear derailleurs deliver maximum drivetrain stability—even through the most punishing terrain. With ROLLER BEARING CLUTCH technology, derailleur bounce and chain slap are eliminated without sacrificing precision.X-ACTUATIONDeveloped specifically for SRAM 1x, X-ACTUATION keeps shifting sharp and consistent across the entire cassette.X-HORIZONThe X-HORIZON rear derailleur’s ‘straight parallelogram’ design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears.X-SYNCSRAM X-SYNC 1x chain rings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chain rings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain.Specifications for XX1 Eagle Rear Derailleur •SPEEDS: 12-speed •MATERIAL: Forged aluminium and carbon fibre •COLOURS: Black, Gold •OUTER CAGE: Carbon fibre  •COMPATIBILITY: Eagle 10-50t only •SPRING: Titanium •BEARINGS: Stainless •CAGE SIZES: Eagle •MOUNT OPTIONS: New improved B-Bolt attachment improves RD durability and consistency. •MAX TOOTH: 50t •PULLEYS: Eagle chain compatible •PULL: X-ACTUATION •TECHNOLOGY HIGHLIGHT(S): X-ACTUATION, ROLLER BEARING CLUTCH, CAGE LOCK •B KNUCKLE: All new B-Bolt attachment method reduces noise and improves durability •OTHER: Type 3 ROLLER BEARING CLUTCH