e*thirteen Vario Infinite Dropper Seatpost - 30.9 120-150mm Blacke*thirteen Vario Infinite Dropper Seatpost 30. 9 120 150mm Black. The Vario Infinite Dropper seatpost uses a proven gas charged spring allowing infinitely adjustable travel and requires 20% less compression force than the competition. The unique upper bushing allows travel adjustments in 5mm increments to a 30mm maximum. Travel adjust is tool free no need to even remove the post from the bike. 3D forged stanchion with integrated head which increases