The Slamset is a premium headset created for riders seeking to lower their handlebars further than the standard stack height without compromising bearing sealing and correct preload. With the hellbender bearing included, the Slamset excels at durability and longevity when it comes to steering performance.Machined from 7075 T-6 Aluminium ,High quality, low friction face-seals,Hellbender bearings feature the highest level of sealing to provide protection against dirt ingress,Lightweight aluminium crown race,Stack: 4.6mm,Weight: 36g.