We use semi-integrated or Zero Stack headsets, although headsets from all manufacturers are compatible with our frames if the cup is designed for a 44mm internal diameter headtube. If you want to find out exactly which headset you need you can find it engraved on your original headset (either 45x45 or 45x36). New headsets or bearings can be purchased at your local SCOTT dealer. With integrated headset cable routing, you will need to remove the cables to replace the headset.