- Function and operation Install a bicycle flywheel on the rear wheel. 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 helps rotate the rear wheel, driving the bike forward and smoothing power delivery. - Why you need it The bicycle flywheel is a key rear-wheel accessory that makes the ride smoother by buffering pedal input and stabilizing power delivery, reducing sudden changes in speed and feel. - Material and durability Made from high-strength steel with high wear resistance, offering improved strength and long-lasting durability. - Drivetrain performance 8 speed freewheel, bicycle flywheel, paired with standard shifting systems for reliable, smooth operation. - Use scenarios - Urban commuting with frequent starts and stops: smoother acceleration and steadier power delivery. - Hills and long climbs: energy buffering helps maintain momentum and reduces pedal effort spikes. - Replacing worn components on a rear-wheel setup: restores smoothness and reliability to the ride.