High-Quality Material: Crafted from aluminum alloy, this 36-hole rear hub is designed for and consistent performance. Reversible Function: Features a reversible backpedal mechanism, allowing for smooth transitions between forward and backward movements. Compatibility: Perfectly fits fixed gear bicycles, enhancing control and stability. Easy Installation: Designed for quick and hassle-free installation, making it ideal for bike repairs and upgrades. Enhanced Safety: The coaster brake system improves efficiency, offering superior safety during rides. Color:As Shown Material:Metal Package Contents: 1 * 36-Hole Coaster Brake Rear Hub Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.