SRAM Force AXS Rear Derailleur - 12-Speed 36t Max Battery Not Included Carbon Cage BLK E1SRAM Force AXS Rear Derailleur 12 Speed 36t Max (Battery Not Included) Carbon Cage Black E1. Lighter faster and more capable than ever the Force AXS 12 Speed rear derailleur does it all in style. Covering cassette ranges from 10 28t up to 10 36t this wireless wonder has a new lighter cage and a larger pulley wheel to increase drivetrain efficiency. One derailleur ready for 2x or 1x the steepest climbs and descents all while shedding 12g from previous