Rear hub made of gold anodized aluminum, measuring Ø30x85 mm with 6 mm and 8 mm keyways. Engineered for high-performance mechanical applications, it combines lightness and strength to ensure maximum efficiency and long-lasting durability. The dual keyways provide enhanced compatibility with various shafts, guaranteeing a secure and stable fit. The anodized finish also offers corrosion resistance and a premium aesthetic appearance.