Hellbender bearings have an improved seal structure and are cross compatible with Cane Creek headsets.Built to live in the most extreme conditions, keeping your riding smoothly through rain, mud, grit, or whatever the road and trail throws at youStainless steel bearings, increased sealing elements and more grease compared to the 110 bearing, the Hellbender is theonly way to make your Cane Creek headset even betterCross-compatible with all assemblies