1 1/8" integrated headset. Cane Creek makes some nice ones.
capwater answered your question.
No! There are multiple internal standards. Campy,Cane Creek,TH,etc...
Originally Posted by orizzonte
Contact framemaker to be sure.
Follow this advice to avoid wasting $. Different angles of the bearings and heights for different headsets.
Originally Posted by Soil_Sampler
There are also two very different types of "internal" headsets, "Integrated" where the bearing cartridges sit right in the headtube ends and "Zero Stack" that uses separate cups pressed into the headtube flairs and serve as bearing seats. They are not at all interchangable.