Cane Creek Hellbender 70 Slam Headset Top Only SLAM THAT STEMGoing with a low stack headset is an easy way to drop your stem down as low as possible. Whether it's for aero gains, a better rider fit, weight savings, or just for the slammed stem aesthetic, whatever the motivation, Cane Creek's Hellbender 70 Slam headset does it all and more. The headset features premium buttery smooth Hellbender 70 bearings that are designed to last countless miles. A high quality 6061-T6 aluminum top cover shaves weight and is an incredible 2mm thin (for Zero Stack configurations). Whether you're searching for marginal gains or a cleaner look, you'll have no problem running Cane Creek's Hellbender 70 Slam headset for years to come. Features Insanely low stack height of 2mm for the ZS and 4. 6mm for the ISEasy way to slam your stem for racing advantages or just the look Premium Hellbender 70 bearings are designed to last6061-T6 aluminum top shaves weight and keeps the height low SPECIFICATIONSTechnical Description ZS44, ZS56, IS41, IS42, IS52Top Type Zero Stack, Integrated Top Head Tube Inside Dia. 1 "Stem Clamp Dia. n/a Top Stack Height2mm (ZS), 4. 6mm (IS)Top Bearing Type Stainless-steel sealed Hellbender bearings Material6061 T-6 Aluminum Weight Manufacturer's Part Number Cane Creek Headset Finder To figure out which headset you need for your particular frame and fork, see Cane Creek's Headset Finder by clicking HERE. | Cane Creek | Hellbender 70 Slam Headset Top Only Top-Zs44/28. 6/h2-Black