The ionic 25 ltd stealth carbon seatpost from 3t uses a new seatpost design featuring the sophisticated and robust 3t exclusive difflock seat clamp the ionic 25 ltd which is made using a monocoque in high modulus carbon fibre places the seat clamp assembly 25mm behind the seatposts centreline this gives athletes the option of a more rearward position on todays shorter framesets the splined alloy difflock coupling is a highly accurate method of setting saddle angle needing only lightweigh