Sram Rb Groupset Red Etap 2 X 12 Speed Axs Wireless Electronic RoadFeatures SRAM Red eTap AXS Shift Brake Levers AXS electronic integration platform X Range gearing compliant Compatible with short pull (standard road) rims brakes or cable actuated disc brakes Derailleur Compatibility: eTap AXS Brake Type: Mechanical Brake Pull: Short Pull Shift Mechanism: Electronic Materials: Carbon (Brake Lever), Plastic (Shifter) SRAM Red eTap AXS Rear Derailleur Orbit chain management technology AXS electronic integration