straight 44mm head tube. And a 1 1/8th hylix carbon fork
You need ZS44 both ends (i.e. ZS44/28.6 upper and ZS44/30 lower), or an adapter crown to fit a 1⅛" steerer in an EC44/40 lower if you want the extra stack of an external cup lower bearing, or the rare chimera EC44/30 lower assembly.
Please may I have some headset advice? I’ve got a steel frame with a straight 44mm head tube. And a 1 1/8th hylix carbon fork. Will this fit?
https://www.santafixie.co.uk/columbus-compass-1-1-2-semi-integrated-headset-black.html?gad_source=1&gbraid=0AAAAADlNKwnRbJu_jzA81M7OjE3WL-nhu&gclid=CjwKCAiAyJS7BhBiEiwAyS9uNdYQP-LJmBKLLVfEF4s7LKB3tcZWPMuPWIzn73tSV5UN2Y8DbVB6ohoC77UQAvD_BwE