1.Lightweight design: Made of CNC forged 6061 aluminum alloy material, it weighs only 541 grams, achieving lightweight without sacrificing strength and durability.2.Stylish Appearance: Featuring a black exterior and stylish design, it not only enhances the overall aesthetics of the bike, but also displays a unique style.3. High-strength axle: Equipped with a high-strength axle, it ensures that it provides stable performance and long-lasting durability under various riding conditions.4. Wide compatibility: Compatible with single, double and triple speed chains, making it adaptable to a wide range of bike configurations to meet the needs of different riders.5. Precision Manufacturing: Bolt center diameter offers 64mm and 104mm BCD options, with 170mm crank length, precision machined by CNC to ensure precise fit and efficient power transmission to the bike.