sram gx type 2.1 10-speed rear derailleur in black

Leveraging the legendary history of SRAM shifting, the GX 2X10 rear derailleur provides incredible shifting speed and precision. Exact 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.Features:Exact actuation™ for precise and dependable 10-speed performanceType 2.1 technologies: roller bearing clutch™ and cage lock™ (also available without type 2.1 configurations)Cage lengths: short, medium and longReplaces x7 & x9 10 speed rear derailleurSpeed (RD): 10sCable pull ratio: exact actuationCage (RD): short, medium, longMax tooth: 36Colour (RD): blackPulley bearings material: steelCage material (RD): aluminium