X-Fusion Shox Manic Dropper Seat Post (170) 31.6x478mmX Fusion Manic Dropper Seatpost 31. 6mm 170mm Black. The X Fusion Manic post uses internal cable routing and was designed around a low profile seat cradle and seal collar to fit a broad range of frames. The mechanism is air sprung and hydraulically locked. The remote can be run on the left or right above or below the handlebar but is optimized as a left shifter replacement for 1x drivetrains. Cable activated hydraulic action infinitely adjustable