Cane Creek Headset 40 Series Bottoms ZS49/30 11/8" 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) Replaces Cane Creek ZS-3 headset. ZS49 Zero Stack Cups fit 49mm ID Head tubes and 1-1/8" 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 Steerer Tube: 1-1/8" Threadless Crown Race: 30.0. Bottom assemblies include bottom cup, sealed oxide bearing, and crown race . Bearing Type: Sealed. Weight: 58.0 g
SPECIFICATIONS COLOR Black GRAMS: 58 MATERIAL: AL-6061-T6 MFG. PART NO. BAA0088K S.H.I.S.: ZS49/30/H4 STEERER DIAMETER: 1-1/8"