CHRIS KING Type Internal Headset Name I1 S.H.I.S. ZS44/28.6IZS44/30 Headtube Opening Upper Lower Headtube I.D. 44.00 mm 44.00 mm (+0.00, -0.05) (+0.00, -0.05) Fork Steerer Tube 1-1/8" 1-1/8" Fork Crown Seat O.D. 30.1 mm 30.1 mm Stack Height 8.2 mm 4.2 mm Min. Ream Depth 9.5 mm 9.5 mm Stem Cap Bolt Torque 1.7Nm (15 in.lbs) * upper stack height = upper cup + bearing cap. * lower stack height = lower cup + baseplate. Made in the USA