BBB Cycling Semi-Integrated Tapered BHP-55 Headset Ahead - tapered - ZS44/28,6 | ZS55/40

Semi-integrated tapered headset for headtube inner diameter 44 mm at the top and 56 mm below and for 1 1/8 - 1.5" tapered steerertubes. 36ºx45º sealed CrMo lower bearings. Aluminum 15 mm cone spacer. Open crown race for easy installation. Replacement bearings available (BHP-96). Construction type (Ahead/Thread): Ahead | semi-integrated/ZeroStack (ZS)