Features: Experience unseamed gear transiting with our 12 speed bicycles cassette flywheel, designs for great performances and durability in every ride. Craft from aluminum alloy and steel, this bike cassette ensures longevities and resistance to wear, providing cyclists with reliable performances. Great for cycling enthusiasts and professional cyclists seek enhances control and efficiency on various terrains. Perfect for mountain biking adventure, road cycling, and also daily commuting, this cassette adapts to various ridings conditions. Upgraded your bike drivetrain with this precisions engineered component, ensuring smooth ridings and improved cycling dynamics. Specifications: Materials: Aluminum Alloy+Steel Color: As The Picture Shows Type: 12 Speed 32T/12 Speed 34T (Optional) Size: approx.30cm/11.81in Package Includes: 1Pc Bike Cassette Flywheel note: Please allow 1-2cm error due to manual measurement. Please make surer you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks!