The integral headset is made to fit low stack 1 1834 frames 40please check drawings for exact sizing41 they include custom made stainless steel bearings 40which are replaceable41 the cups 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 thei