Fsa impact integrated 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 features 1 18 45 x 45 acb gyro compatible for a 42mm inner diameter headtube 118 steerer campy compatible bearings yellow seal 7075t6 crown race stack height 94mm buy f