A premium threadless/Ahead semi-integrated headset to fit modern bikes with a 44/56mm ID headtube and tapered 1-1/2" - 1-1/8" steerer
Alloy cap/cups/topcap w/ ACB sealed cartridge bearings (Upper = 45°x45° / Lower = 36°x45°)
ZS44/28.6 – ZS56/40
12.5mm