Feature: 1. Chromium molybdenum steel material, high rigidity and high strength, wear resistance is higher than peers. 2. Made of high‑quality chromium‑molybdenum steel (cover nickel‑chromium treatment), corrosion resistance, good heat resistance. 3. Easy to maintain, seldom rubbed internally, don't worry about long‑term use of frictional heat, which will affect its life. 4. Smoothly rotation without noise, high‑precision internal thread, to ensure close connection with the bicycle hub, stable operation. 5. Climbing is more labor‑saving than a single crank, compatible for SRAM, shifting is more sensitive. Specification: Item Type: 8 Speed FreewheelMaterial: Chromium‑Molybdenum Steel (Cover Nickel‑Chromium Treatment)Color: SilverWeight: Approx. 412.0g/14.5ozQuantity: 1PcsSpecification: 11-36T Speed: 8 Speed Compatible for SRAM Number of Teeth: 11-13-16-20-24-28-32-36T Adaptation: Road Bike Product Details: Lead chain slot + mud hole design: Guide chain slot design makes shifting more sensitive The mud drain hole is easier to clean and not easy to drop the chain Sprocket: accurate chain guide effect, allowing smoothly riding and accurate shifting. Package List: 1 x 8 Speed Freewheel Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.