The integrated headset is made to fit in 1 18 frames where to bearings fit directly into the frame they include custom made stainless steel bearings 40which are replaceable41 the taper ring and crown race 40which is split for easy installation and removal41 are all machined from 2014 t6 aluminiumall headsets come complete with the hed doctor sealing is achieved through an adjustable taper ring cover and integrated rubber seal the bearings also incorporate their own sealing and