SRAM NX 1x11 Long Cage Rear Derailleur NX is SRAM's 1x drive train for the masses. All the key functionality features of high end 1x derailleurs are built in.Cannot be used with double or triple chainringsX-Horizon geometrySame roller clutch and CageLock features as high end modelsItem SpecificationsColorBlackWeight322Largest Cog42Chain Wrap Capacity25Cage LengthLongDrivetrain Speeds11Rear Der/Shifter CompatibilitySRAM X-ActuationRear Derailleur Mount Type10x1 StandardSRAM NX 11 Speed Rear Trigger Shifter BlackBall bearings at the rotation interface make for a smooth-feeling shifter that is very durable. Use with SRAM 11-speed MTB rear derailleurs.Item SpecificationsColorBlackWeight141Drivetrain Speeds11Rear Der/Shifter CompatibilitySRAM X-ActuationShifter StyleTrigger SRAM NX Groupset Kit-In-A-Box Mtn Group