Key benefits - Energy transfer and storage When you pedal, the chain drives the flywheel. The flywheel’s inertia stores energy, helping rotate the rear wheel and contribute to forward propulsion. - Smoother ride The inertial feel of the flywheel smooths pedal strokes, reducing pedal fluctuations and enhancing ride comfort. - Important rear wheel accessory A key component on the rear wheel that improves overall ride quality and cycling experience. - Durable steel construction Steel provides high wear resistance, high strength, and long-lasting durability in demanding riding conditions. - 12 speed freewheel for reliable shifting 12 speed freewheel enables smooth, coordinated gear changes with your shifting system. Product specifications - Material: steel - Speed: 12 speed freewheel - Function: converts pedaling energy into stored inertial energy in the flywheel, then transfers energy to drive the rear wheel Installation and compatibility - Installation: install on the bicycle rear wheel as a flywheel accessory; the chain transfers pedaling energy to the flywheel during operation. - Compatibility note: designed for 12 speed freewheel shifting systems; ensures smooth and reliable gear changes within that configuration. Use scenarios - Daily urban commuting Enhances ride smoothness and provides stable propulsion on varying terrain, reducing rider fatigue. - Long rides and climbs The flywheel’s energy storage helps maintain a steady cadence, improving efficiency on extended ascents and descents. - Bike maintenance or upgrade Replacing or upgrading to this steel 12 speed flywheel can improve wear resistance, durability, and shifting performance on compatible bikes.