SRAM GX Eagle 12-Speed Chain 126 links With PowerLockThe chain is the heart of the Eagle 1x12 drive train, ensuring quiet operation, long life and precise shifting. Same link geometry as XX1 Eagle, with solid pins and a more modest finish treatment.Not for use with front derailleur drive trainsItem SpecificationsColorSilver/GrayWeight260Links126Defined ColorSilverHalf Link ChainNoDrivetrain Speeds12Chain Connection TypeSingle Use Master LinkSRAM GX Eagle Rear Derailleur 12 Speed Black This new GX derailleur not only answers the Eagle(TM) drivetrain's need for greater capacity, but it's also the next evolution of our proven, 1x-specific X-HORIZON(TM) design. The larger, 14-tooth X-SYNC(TM) lower pulley allows 10- to 50-tooth cassette, and also adds to Eagle's overall smooth-pedaling feel. Our new, Type-3 ROLLER BEARING CLUTCH(TM) features a smoother torque curve for a quieter, more consistent operation and feel. CAGE LOCK(TM) has been moved back and out of the way, protecting it from trail debris. And a redesigned, robust mounting system further improves the Eagle(TM) derailleur's performance and overall durability.Includes SRAM Eagle Rear Derailleur Chain Gap Adjustment Gauge!12 speedColor: BlackX-Actuation ratio specifically engineered for SRAM's 1x12-speed Eagle drivetrainX-Horizon design aligns the parallelogram to a horizontal axis providing constant chain gap across all 11 gears resulting in fast, precise shifts with reduced shifter forceType-3: features a smoother torque curve for a quieter, more consistent operation and feel, with an incorporated CageLock feature for faster wheel changes and chain serviceLarge 14-tooth X-Sync lower pulley allows for the 10 to 50 tooth cassette capacity in this compact designMaterial: Aluminum, Steel pulleyStainless hardware290g SRAM GX Eagle Groupset Kit-In-A-Box Mtn Group