The Sram X01 Type 2.1 Rear Derailleur facilitates the experience of mountain bikers with a horizontal parallelogram that eliminates chain movements and ghost shifting, which makes shifting smooth and precise. It features 11 speeds, a maximum capacity for 42 teeth, and a bearing clutch that eliminates chain bounce and bumps.This bike rear derailleur is made of aluminum, while the pulley bearings are steel. The X SYNC technology provides good performance, easy shifting, and silent operation. The X HORIZON allows for faster and effortless shifting. Besides, it comes with a cage lock that makes wheel removal and installation easier.Thanks to its ™horizontal parallelogram™ design, X-HORIZON™ can keep the chain gap the same across all 11 gears.By taking vertical movement out of the equation, this design doesn™t just make shifting faster™it 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 X01 shifter, the X-HORIZON™ RD forms the backbone of X-ACTUATION™ technology:the key to totally smooth shifting action.Features:- Large upper pulley offset automatically adjusts chain gap - X-HORIZON™ design reduces shift force and ghost shifting - 12-tooth X-SYNC™ pulley wheels - Sealed cartridge bearings Specifications:- Speeds:11-speed - Material:Carbon fiber or aluminum outer cage - Weight:250g - Compatibility:1x11 X-ACTUATION™ - Bearings:Sealed cartridge bearings - Cage Sizes:Long - Pivot Design:Horizontal Parellelogram design - Max Tooth:42t - Pulleys:12-tooth X-SYNC™ pulley wheels - Technology Highlight(s):X-ACTUATION™, X-HORIZON™, X-SYNC™, ROLLER BEARING CLUTCH™, CAGE LOCK™ Technology:CAGE LOCK™:With 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 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-ACTUATION™:Developed specifically for SRAM 1X, X-ACTUATION keeps shifting sharp and consistent across the entire 10- to 42-tooth cassette.X-HORIZON™:The 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-SYNC™:SRAM 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...