Cane Creek 40 ZS44/28.6 / EC49/40 Tapered Headset, Tapered Steerer Black Carbon-friendy compression ring captured in top cover, keeping shims in place Steel crown race with integrated seals Sealed black oxide bearings Interlok spacer compatible Compatible with tapered 1-1/8" to 1-1/2" steerer tubes, or straight 1-1/8" steerers with a conversion crown race (sold separately)