Description: 【Quality Material】: Crafted from aluminum alloy, this wheel hub offers exceptional strength and durability, ensuring it remains deformation free even after prolonged use. Its sturdy construction make it ideal for challenging environments like rain and mud 【Versatile Size Compatibility】: This wheel hub is suitable for matching inner tubes with outer tires, guaranteeing a smooth ride every time 【Lightweight Design】: The aluminum alloy structure is significantly lighter than traditional steel hubs, reducing the overall weight of your folding bike or scooter and enhancing maneuverability for a great riding experience 【Enhanced Load Capacity】: Engineered to withstand higher loads and impacts, this wheel hub is suitable for commuting as well as navigating complex road conditions with ease 【Product Specifications & Packaging】: With a diameter of approximately 21.7 cm/8.54 inch, this package includes a aluminum alloy wheel hub ready to upgrade your bike's performance Specification: Material: Aluminum Alloy  Size Chart: Diameter: 21.7 cm/8.54 inch Package Includes: 1 wheel Hub Note: Please allow slightly errors due to manual measurement and different monitors.