Suspension seatpost that works according to the parallelogram principle. In contrast to other suspension seatposts, the Suntour does not move as far downwards during compression, but also slightly backwards. This shift in the compression movement means that the seat height does not change as much. A steel spring/MCU elastomer combination is used as the suspension medium. The preload can be individually adjusted using an Allen key. Note Soft: for rider weight up to 75 KG Medium: for rider weight 70-95 KG Hard: for rider weight 90-120 KG Caution: DO NOT fit in conjunction with child seats without a parallelogram shell.