Featuring some of the lowest stack height bearing cover options available, the Hellbender 70 Slam from Cane Creek is a premium headset designed for riders who want to lower their handlebars without compromising bearing longevity.Constructed with 6061 T-6 Aluminum cups and covers, this headset is both lightweight and strong. The top cover is specifically designed to have the lowest stack height possible for ZS and IS headsets.The alloy dual-seal crown race provides excellent seal efficiency, while the low friction carbon-friendly compression ring ensures smooth operation. The Hellbender 70 Slam also features premium sealed stainless steel HELLBENDER bearings, which offer optimal performance and durability.With a stack height of only 2mm for ZS headsets and 4.6mm for IS headsets, this headset allows riders to achieve a lower handlebar position. Say goodbye to excess stack height and hello to a more streamlined and efficient ride.Upgrade your bike with the Hellbender 70 Slam IS41/IS52 BLK 4.6mm headset from Cane Creek. Take your riding to the next level with this high-quality and performance-driven headset.