The tapered headset is designed to fit frames which are sized to accept integral 1 1/8" top cup and 1.5" integral bottom cups, where the fork steerer has a 1.5 crown and a 1 1/8" top. It is also possible to fit a standard 1 1/8" steerer using an additional conversion crown. The headsets include custom made stainless steel bearings (which are replaceable). The cups, taper ring and crown race (which is split for easy installation and removal) are all machined from 2014 T6 aluminium.All 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 being made from stainless steel resist corrosion - a real advantage over a conventional steel bearing. The tapered headset is only available in blackCNC machined in Barnoldswick, EnglandCustom stainless steel bearings made by INA of SwitzerlandUpper and lower cup sealingAll parts replaceable individuallyColour: Black