Cane Creek Headset 40 Series Bottom ZS56/40 Lower Assembly Contoured and relieved 6061-T6 aluminum for minimized weight and maximized strength, with split-lip sealed stainless steel bearings. Low friction, Dual-Seal crown race and top cover provides maximum sealing from contaminants, plus a captured compression ring design for carbon steerer compatibility (Interlok spacer compatible, sold separately) ZS56 Zero Stack Cups fit 56mm ID Head tubes and 1.5" straight steerer tubes Black oxide, sealed cartridge bearings. Zero Stack (ZS) assemblies feature press-in cups with bearings inside the frame. Internally relieved AL-6061 T-6 cups and covers. Bottom assemblies include bottom cup, sealed oxide bearing, and crown race Steerer Tube: 1.5" Threadless. Crown Race: 39.7mm. Stack Height: 4mm. Bearing Type: Sealed. Weight: 65 grams.
SPECIFICATIONS COLOR Black COMPLETE/TOP/BOTTOM Bottom GRAMS 65 MATERIAL AL-6061-T6 MFG. PART NO. BAA0090K S.H.I.S. ZS56/40/H4 STEERER DIAMETER 1.5''