WCS (WORLD CHAMPIONSHIP SERIES) – These words evoke the core philosophy behind Ritcheys highest performance components. The rainbow stripe WCS logo represents the numerous world champions that have won on Ritchey. The WCS line is the gold standard for lightweight, bombproof race parts and cutting edge innovation. Features: Titanium coated high quality, long lasting bearings only featured in WCS Supplied with matching alloy starnut (star nut, bolt, top cap) Lightweight, precision-machined aluminium cups Logic = Smaller upper scale angular cartridge bearing saves weight, larger lower bearings boosts strength and durability Uses ritchey grease and sealed design for years of trouble free performance Anodized black finish Fits standard 1.1/8 headtubes 103g Headset Specs: 28.3mm stack height Upper S.H.I.S EC34/28.6 Lower S.H.I.S EC34/30 If unsure about S.H.I.S headset Sizing click the link to the Website: a href= https://bicycleheadsets.com/Home_Page.php target= _blank bicycleheadsets.com/a Ritchey Headsets Our headsets dont always get the attention they deserve; beautiful handlebars and stems can be so distracting But this component is the interface between frame, fork and stem, and the basis for precision steering. Ritchey headsets are designed to take the abuse of bad roads and tough trails, while delivering smooth, reliable performance over the long haul.