When only the best will do fsa developed k force series featuring the latest advancement in carbon composite and metal alloy technology coupled with state of the art manufacturing processes k force component will always showcase the pinnacle of fsas addiction to advancements in the art of product development the fsa k force 25mm setback carbon seatpost is made from one piece of unidirectional carbon fibre with 25mm of setback to help give you the right fit the clamp is forged from alloy to