HEADSET COMP SEMI-INTEGRATED ZS44/28.6 | ZS56/40

For bikes with semi-integrated ZS head tubes, the Ritchey Comp Semi-Integrated ZS headset stands out above all others.  

Tapered version
Stack Height: 11.6mm
Material: Steel
Headtube ID upper : 44mm
Headtube ID lower : 56mm
Upper Fit (S.H.I.S.): ZS44/28.6
Lower Fit (S.H.I.S.): ZS56/40
Bearing: Semi Cartridge (SSC)  

Verified weight without starnut