Install a bicycle flywheel. When the cyclist pedals, energy is transferred to the flywheel via the chain. Due to the inertia of the flywheel, the energy stored in the flywheel rotates the rear wheel and drives the bike forward. The bicycle flywheel is an important accessory on the rear wheel of a bike, which makes the ride smoother. Material: steel with higher wear resistance, high strength and durability. High performance: High precision threads ensure a tight connection with the hub, smooth operation, accuracy and reliability, and overall good performance. Use scenarios - Daily urban commuting: smooths power transfer during frequent starts and stops, improving ride feel on city streets. - Long-distance riding: maintains momentum and provides steadier energy transfer over extended periods. - Uphill and mixed terrain: helps stabilize pedal input and reduces drifts in power delivery on climbs. Notes - Designed to be installed on the rear wheel hub interface with precision threading to ensure secure and reliable operation.