Description: 1. Size: 7x6.5 cm 2. Weight: 44 grams 3. The main body of the drum is made of nylon, with built-in bearings, which will not damage the chain. 4. Dry the surface after cleaning to prevent water from entering the bearing. 5. How to use: 1. Adjust the chain to the smallest flywheel, and then remove the rear wheel. 2. Install the virtual flywheel on the frame, and then attach the chain to the virtual flywheel. 6. This tool can virtualize the existence of a flywheel when the rear wheel is removed, which is convenient for cleaning the chain and flywheel.
