The tapered headset is designed to fit frames which are sized to accept integral 1 1834 top cup and 1534 integral bottom cups where the fork steerer has a 15 crown and a 1 1834 top it is also possible to fit a standard 1 1834 steerer using an additional conversion crown the headsets 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 201