Description <br> Features: Transform your foldings bikes performances with our innovative 3 speed external freewheels, integrating a cassette for a wonderful upgraded. <br> Craft from aluminum alloys and steel, this freewheels designs ensures a lighter, more efficient ride with safety shifting. <br> Great for foldings bike enthusiasts and cycling modifiers who want enhances portability and multifunctionality in their ridings. <br> Perfect for commuters seek smooth transitioning across varying terrains and frequent stops, this freewheels offer the flexibility need for city life. <br> Elevates your cycling experience with precisions assembly that ensures smooth and precise gear changes, making every parking or ridings. <br> <br> Specifications: Materials: Aluminum Alloys, Steel <br> Color: As The Picture Shows <br> Package Weight: approx.119g <br> Diameter: approx.7.0cm/2.75in <br> <br> Package Includes: 1Pc 3 Speed Cassette Freewheels <br> <br> note: Please allow 1-2cm error due to manual measurement. Please make surer you not mind before your bid. <br> Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks! <br>