Item Type: Rotating Positioning FreewheelMaterial: Alloy SteelTechnique: Chrome platingTeeth Quantity : 13-14-16-18-20-22-24-28TSpeed Change Level: 8 / 24 speedNotes:1. Manual measuring, please allow 1-3mm error, thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 1Three layer plating, anti rust, exquisite, wear resistant. High accuracy positioning tooth type, efficient transmission. 2An integral component for mountain bikes, this freewheel is equipped with a rotating positioning system to increase accuracy and responsiveness. 3Constructed with premium materials for longevity, this freewheel is guaranteed to stand up to the most demanding riding conditions. 4Perfect for the cyclist, this 8 speed freewheel enhances your riding efficiency and makes gear shifting seamless and stable. 5Easy to install and reliable in performance, our bike freewheel is the ideal upgrade to enhance your biking adventures.