Feature:1. The flower drum is tightly fixed with accuracy thread, and the thread polished by accuracy machine tool is clear and firm2. Flywheel and flower drum are closely combined to make riding more comfortable and smooth3. The movable flywheel rotates gently and runs smoothly. There is only a slight "tick" sound during operation4. 24T movable flywheel is mostly suitable for single speed, ordinary, BMX Bicycle, folding bike, tricycle5. Smooth and powerful operation, deep lubrication, smooth and labor saving riding. Let you ride happilyHow to Use:The production standards of bicycles are different. The inner diameter of the flywheel used is the same, and the number of teeth outside the flywheel is different. When purchasing, you need to first confirm whether the number of flywheel teeth of your car corresponds to each other, so as not to buy the wrong one;Most of the movable flywheel is applicable to ordinary bicycles, folding carts and baby carriages. If it is a tricycle or electric vehicle, please measure the size of the lower thread; If it is 35mm, it can be universal.Specification:Item Type: Bike FreewheelMaterial: SteelProcess: Fine Quenching, Special High Tensile Steel, Brown PlatingThread Inner Diameter: Approx. 34mm / 1.3inNumber of Teeth: 24TApplicable: Single Speed , Ordinary , For BMX Bicycle , Folding Bike , TricyclePackage List:1 x B