Leveraging the legendary history of SRAM shifting, the X5 rear derailleur provides incredible shifting speed and precision EXACT ACTUATION™ technology eliminates slop and shifting variation.Features:DIRECT ROUTE™ technology for lighter effort shifting36-tooth cassette compatibilitySpecifications:Speed (RD): 10s, 9/8/7s, 9sCable pull ratio: 1:1, Exact actuationCage (RD): Long, MediumMax tooth: 34, 36Color (RD): Black, SilverPulley bearings material: Standard, SteelCage material (RD): Aluminum, Aluminum/Steel