For bikes featuring integrated headsets (such as the Ritchey Road Logic and Swiss Cross), the WCS Integrated IS Headset stands above all others. This alloy headset lower features stainless steel angular contact sealed cartridge bearings with a titanium coating for corrosion resistance, and they're packed with Ritchey high-webbing grease.
 
Material: alloy
Stack height: zero
Headtube ID: 42, 47, 52mm
S.H.I.S.: IS42/30 (1 ?”), IS47/33 (1 ¼”), IS52/40 (1.5") 
IS42/30 (1?") bearing: 41.8/30.5/8mm 45°/45° - sealed cartridge (ACB) – titanium coated
IS47/33 (1 ¼”) bearing: 41.8/34.1/8mm 45°/45° - sealed cartridge (ACB) – titanium coated
IS52/40 (1.5") bearing: 51.9/40/8mm 45°/45° - sealed cartridge (ACB) – titanium coated
Weight: 30g
Colour: black