1、Durability and Stability: 18T single speed freewheel is made of steel, high performance and heat resistance, anticorrosion, long service life. 2、Low Noise: 18T single speed bike freewheel features stable rotation and low noise operation, ensuring a smooth and enjoyable cycling experience. 3、High Accuracy Internal Thread: Threaded single speed bike freewheel ensures a tight connection with the hub and provides smooth operation. 4、Easy to Install: The 18T single speed bicycle flywheel is lightweight and compact, and can be easily removed or installed on the bicycle. 5、Compatibility: This kit is suitable for a wide range of single speed bike. Upgrade your bike and enjoy a more efficient and enjoyable riding experience.