The Ritchey Comp Cartridge Integrated IS headset upper features full complement stainless steel angular contact sealed cartridge bearings packed with Ritchey high-webbing grease.
 
Material: alloy
Stack height: 9.1, 16.0mm
Headtube ID: 41.2, 42.0mm
S.H.I.S.: IS41/28.6 (1 ?”), IS42/28.6 (1 ?”)
IS41/28.6 (1 ?”) bearing: 41.0/30.15/7mm 45°/45° - sealed cartridge (ACB)
IS42/28.6 (1 ?”) bearing: 41.8/30.5/8mm 45°/45° - sealed cartridge (ACB)
Top cap included
Weight: 39g
Colour: black