The PI-1 Alloy 45×45 headset has an aluminum ...
top cap, upper bearing cover, lower race and upper and lower cups. All-aluminum construction results in a lightweight headset. Each headset is fitted with super-smooth rolling, precision, 45×45 angular-contact sealed bearings.
The Ritchey Classic Semi Integrated ZS Headset Upper ...
is compatible with bicycles that take a semi-integrated ZS headset. The Semi Integrated ZS Headset Upper features full-complement stainless steel angular contact cartridge bearings packed with Ritchey high-webbing grease. Wrapped in Ritchey’s ...