XC spec and ready for the trail. XX1 Eagle AXS utilizes the proven backbone of SRAM 1x. With the lightest weight materials and a 520-percent gear range. The pinnacle of performance, paired with the connected components of Eagle AXS. Ready for the new generation of superbikes. Details: XX1 Eagle AXS Rear Derailleur Speeds: 12 Color: Black Cage Material: Carbon Pully bearings: Steel Max cassette teeth: 52 Pod Ultimate Controller Orientation: Left or Right Clamp: Discrete Color: Black/Silver Rocker Paddle compatible (optional) XX1 Eagle AXS Upgrade Kit Includes Rear Derailleur with Battery Controller with clamp USB-C Charger (USB-C cord not included) Chain gap tool Compatibility: Cassette: Sram Eagle 12-speed cassettes Chain: Sram Eagle 12-speed chains