The ionic 25 pro seatpost from 3t is made using a new seatpost design featuring the sophisticated and robust 3t exclusive difflock seat clamp the ionic 25 pro which is made from a fabricated aluminium alloy 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 lightweight clamping by side