The 40-Series is the workhorse of Cane Creek's headset line-up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long-lasting headset. Integrated bearings fit directly into compatible head tubes without the need of a bearing press. FEATURES: Sealed black oxide bearings Carbon-friendy compression ring captured in top cover, keeping shims in place Steel crown race with integrated seals Interlok spacer compatible Uses 36/45 degree crown race and compression ring 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) SPECS: Color: Black Crown Race: 40mm S.H.I.S. Stem Clamp Diameter: 28.6mm Threadless Bearing Type: Cartridge S.H.I.S Lower: IS52 S.H.I.S Upper: IS41