Cane Creek Headset UppersReplaces 110 IS headset top41mm angular contact bearings feature 36degree inner chamfer, 45degree outer (36/45)Directly compatible with 41mm headtube and fits 42mm (Italian) head-tube with supplied 0.25mm shimIntegrated (IS) assemblies feature chamfers molded inside the head-tube with no press-in cups15mm stack height (tall) top coverInternally contoured and relieved cups and covers minimize weight and maximize strengthTop-quality polishing, anodizing and laser etchingLow-friction top cover seal completely seals cup from solid and liquid contaminantsFully captured top cover - no loose partsUpdated compression ring design further enhances "carbon friendly" uses by evenly distributing clamping forces on the steererInterlok spacer compatibleItem SpecificationsColorSilverWeight41.8gMaterialAluminumSteerer Tube1-1/8" ThreadlessStack Height15mmBearing TypeStainless SteelHeadset TypeIntegrated, 41.0mm OD, 45 degree bearing (IS)S.H.I.S UpperZS41S.H.I.S. Clamp Diameter28.6