Cane Creek 40 IS42/28.6 IS52/40 Short Cover Headset, Black40 Series Integrated headsets set the standard for performance, durability and value. Drawing from the premium 110 Series design, the 40 Series includes all the features necessary for a durable, lightweight, long lasting headset. 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) Sealed ZN40 cartridge bearings 6000 series alloy cups and materials Steel crown race with