Feature: 1. With smoother speed change, reduced perforation weight, and strong compatibility. 2. Mainly made of high quality steel material, it has high strength, sturdiness and durability. 3. It features high temperature resistance, rust prevention, no deformation, wear resistance and so on. 4. High‑precision tooth outline for precise positioning. Simple structure, it is easy to screw into the hub, easy installation and use. 5. Suitable for mountain bikes and folding bicycles, for hybrid bike, city bike, beach crusier bike and so on. Specification: Item Type: Threaded Freewheel Material: Steel Product Color: As Pictures Shown Product Weight: Approx. 600g / 21.2oz Speed: 8 speed Number of Teeth: 13-14-16-18-21-24-28-32T Package List: 1 x Flywheel Note: After the installation is complete, check whether the flywheel is locked and whether it is aligned.