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Leveraging the legendary history of sram shifting the gx 2x11 rear derailleur provides incredible shifting speed and precision. X-actuation™ technology eliminates slop and shifting variation. Roller bearing clutch™ technology delivers maximum drivetrain stability-even through the most punishing terrain. And with cage lock™ technology wheel removal and installation are easier than ever. - speed (rd): 11s - cable pull ratio: x-actuation - cage (rd): long medium - max tooth: 42 - color (rd): black red - pulley bearings material: steel - cage material (rd): aluminum - weight based on: rd 2x11 long cage black - weight (g): 289