Lighter, faster and more capable than ever, the Force AXS 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 generation Force.