- Professional Design : Each underframe is engineered with premium components and advanced technology, allowing riders to maximize energy efficiency and boost speed. - Exceptional Craftsmanship : The specially threaded bottom ensures a secure fit, preventing any rattling. The gutter seal design minimizes friction while enhancing durability and performance, leading to a smoother ride. - High-Quality Material : Constructed from top-grade aluminum alloy, this bike bottom bracket is robust and built to last. The aluminum alloy shaft bushing ensures direct power transmission, eliminating energy loss associated with plastic components, while providing superior rigidity and stability. - Compatibility : Designed for φ24/24mm (22/24mm) main shaft crank sets. Compatible with BB386EVO/PF30 68/73/86mm with φ46mm external diameter cases. Features an inner diameter of φ24mm. - Use Scenarios : - Ideal for competitive cyclists looking to enhance performance through efficient power transfer. - Suitable for recreational riders who value a durable and reliable component for everyday cycling. - Perfect for bike builders and mechanics needing a high-quality bottom bracket for custom setups. This bottom bracket combines quality, performance, and compatibility to meet the needs of serious cyclists.