KS Rage-i Dropper Seatpost - 34.9mm 150mm BlackKS Rage i Dropper Seatpost 34. 9mm 150mm Black. Rage i is dropper performance at a never before seen value. Being our KSs entry priced offering Rage i leaves nothing to compromise. Rage i features a two bolt micro adjust head stanchion tube that doubles as an open bath hydraulic cartridge body and an overall weight that gives competing droppers at three times the price something to worry about. Micro adjustable head clamp with black steel bolts Air