Featuring some of the lowest stack height bearing cover options available, the Hellbender 70 Slam by Cane Creek is a premium headset designed for riders who want to lower their handlebars as much as possible without compromising the longevity of the bearings.This headset is made with 6061 T-6 Aluminum cups and covers, ensuring durability while minimizing weight. The top cover is specifically designed to have the lowest stack height possible for both ZS and IS headsets.The alloy Dual-Seal crown race provides excellent seal efficiency, while the low friction carbon-friendly captured compression ring ensures smooth operation. The Hellbender 70 Slam also features premium sealed HELLBENDER stainless bearings, guaranteeing top-notch performance.In terms of stack height, the ZS version has a 2mm top, compared to the 8mm top found in a regular ZS Hellbender. The IS version, on the other hand, has a 4.6mm top compared to the 9mm top found in a regular ZS Hellbender.Choose the Hellbender 70 Slam by Cane Creek for a high-quality headset that allows you to lower your handlebars while maintaining optimal bearing performance.