The 40-Series is the work-horse of Cane Creek's headset line-up. The series incorporates all the features necessary for a durable, light-weight, long-lasting headset and represents the perfect balance of performance, durability and value. Suitable for any type of bike including road, gravel MTB.The new ZN40 bearings are a zinc-coated, machined steel cartridge bearing with hardened steel balls. The new material is much more corrosion-resistant, which vastly increases the longevity of the 40 series headsetsMachined from 6061 T-6 AluminiumInnovative Clip-Seal completely seals the top assembly and captures the compression ring to reduce the numberof loose partsHigh quality, low friction face-sealsDurable steel crown raceDependable ZN40, sealed bearingsInterlock spacer compatibleColour: BlackWarranty: 1 Year (excluding bearings)Note: Tall/Wide Cover version fits specific Yeti frames - 2019 + SB150 / SB165 or anything else that requires the 51.5mm cover.