Tapered integral headset tapered headset is designed to fit tapered frames 44mm top and 56mm bottom frame diameter and tapered forks headset uses custom made replaceable stainless steel bearings to resist corrosion the cups taper ring and crown race which is split for easy installation and removal are all machined from 2014 t6 aluminium sealing is achieved through an adjustable taper ring cover and integrated rubber seal can be used with straight 1 18 forks with additional conversion crow