So after some reading I’ve gathered that the reducer doesn’t actually replace the crown race (which was my first impression), but fits between the crown race and the bottom cup. So I’ll need a Hope crown race, rather than matching the headset itself?
edit: Except no, reducer goes on first and then crown race on top of that, so crown race should still match the headset. Right!?
Yeah, you should be able to just whack that in between the new fork steerer and the old crown race. I suppose there’s a small chance that it might not fit the existing race, technically it’s only designed for Hope headsets, but I’d be quite surprised if it doesn’t fit yours too.