Function and operation - Install the bicycle flywheel on the rear wheel. When the rider pedals, energy is transmitted through the chain to the flywheel. The inertia of the flywheel stores this energy, turning the rear wheel and driving the bicycle forward. Key benefit - The flywheel serves as a important rear-wheel accessory that makes the ride smoother and more stable. Material - Made of steel with high wear resistance, high strength, and durability. Performance and installation - Uses high-precision threads to ensure a tight connection with the bicycle hub, allowing the chain to rotate smoothly and with minimal effort. Use scenarios - Urban commuting on rough roads where pedal input is irregular: the flywheel smooths power delivery for a steadier ride. - Long-distance riding on flat terrain: stored energy helps maintain momentum between pedal strokes. - Climbing and sprinting: energy is stored during each pedal stroke and released to assist the rear wheel, improving stability and reducing rider effort.