What size/kind of closed bearing headset will I need? Or how do I find out? Bike is 2005ish specialized Allez, originally with open ball bearings headset (don't know the proper nomenclature🧐). See
What size/kind of closed bearing headset will I need? Or how do I find out? Bike is 2005ish specialized Allez, originally with open ball bearings headset (don't know the proper nomenclature🧐). See