The ionic 0 team carbon seatpost from 3t uses a new seatpost design featuring the sophisticated and robust 3t exclusive difflock seat clamp the ionic 0 team which is made using a carbon fibre shaft bonded into an alloy head places the seat clamp assembly in line with the seatpost for zero setback many athletes seeking outright speed favour this more forward position on the bike some frame designers are also specifying a slacker seat tube so riders can set their bike up with an inline post