Supertype cassette is a component that has been studied and designed for maximum lightness, customization of gear ratios and functionality. Sprockets are made of AL 7075-T6, and CNC finished to ensure perfect indexing and guarantee compatibility with all transmission systems. Anodization with the HT (Hard Treatment) process gives the sprockets their particular charcoal colouring and increases their resistance to wear. The cassette\'s special construction, with separate sprockets, allows for custom gear teeth combinations, ensuring transmission capability. Features: AL 7075-T6 - CNC - Hard Treatment Steel first-middle position sprocket Steel first position sprocket AL 7075-T6 lock ring 165g (12-25)