Features1 MATERIAL: Crafted with aluminum alloy, this flywheel is highly resistant to rust, ensuring long lasting durability. Its fine rotation provides a noise free riding experience for improved cycling performance. 2ACCURATE CONNECTION: The high accuracy internal threading ensures a secure and tight connection between the flywheel and the bike hub, providing stability and optimal power transfer for a seamless cycling experience. 3LIGHTWEIGHT DESIGN: Featuring a hollowed out design, this flywheel effortlessly reduces weight, minimizing the burden during rides. It strikes a balance between strength and weight, making it the ideal choice for reducing bike weight. 4ENHANCED PERFORMANCE: With its 12 speed cassette design, this flywheel provides a wider range of gear options for improved cycling performance. Experience finer gear shifting and increased power transfer for a more efficient ride. 5DURABLE AND RELIABLE: Engineered with craftsmanship and built to withstand the toughest cycling conditions, this flywheel delivers consistent and reliable performance, providing an enhanced riding experience every time.SpecificationItem Type: Bike cassetteMaterial: Aluminium alloyWeight: Approx. 795g / 28ozPackage List1 x Flywheel3 x Sprocket