The new Supertype HSL cranks are made of the latest generation of carbon fibre with a "hollow structure" system and a four-arm design. The innovative "High Stiffness Link" gear mounting system with six attachment points allows for greater rigidity and thus greater shifting precision, thanks to the additional attachment points' position, located in critical torsion areas on the gears. The gears are made of 7075-T6 AL, finished in CNC with particular attention to the loading and unloading points on the chain for quick, precise shifting: the surface treatment of anodizing with the HT (Hard Treatment) process maximizes resistance to wear.