This item is a lower-only headset assembly. The upper assembly may be purchased separately if needed. 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. Zero stack uppers press into head tube with very little stack height. Zero stack cups press into the head tube with very little stack height. Sealed black oxide bearings Steel crown race with integrated seals 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)