The fsa k force 272mm seatpost the k force light uses one piece continuous carbon fiber construction with fsa39s minimal top clamp mtc design for strength and lightweight m5 chromoly and stainless steel hardware is used in the seat clamp the k force featuring 25mm and 35mm of setback for better bike fit and saddle support fsa k force 272mm seatpost features forged alloy minimal top clamp mtc 0 25 or 32mm setback options available one piece continuous carbon fibre