Fsa the big fat pig headsetfull speed ahead fsa produces world class bicycle components for road cycling mtb and triathlon for world tour teams club riders and people who just love to ride their bikes fsa has a long history in the sport of cycling and a strong heritage of innovation in design and manufacturing featuresthreadless headset with forged chromoly cups21mm headtube insertion super oversized 732 ball bearings chromoly crown race and aluminium top cap upper stack height 16 9