Function - Install a bicycle flywheel on the rear wheel. When the rider pedals, energy is transmitted via the chain to the flywheel. The flywheel's inertia stores energy, turning the rear wheel and driving the bicycle forward. Key benefits - Smooths power delivery and reduces drivetrain shock for a more comfortable ride. - Helps maintain momentum, especially on inclines or variable terrain. - Supports reliable operation of the drivetrain by providing consistent energy transfer. Compatibility and performance - Compatible with 8, 9, 10, 11, and 12 speed freewheel systems. - Designed to work with bicycle rear drivetrain configurations to support smooth shifting and reliable performance. Material and durability - Constructed from high-strength steel and alloy, providing higher wear resistance, strength, and long-term durability. Use scenarios - Long uphill rides: energy storage assists maintaining forward momentum on climbs. - Urban commuting: smoother starts and stops in stop-and-go traffic. - Road and trail touring: consistent power delivery for steadier handling and cadence. Installation and function notes - Installed on the rear wheel as a rear wheel accessory to enhance ride quality and efficiency. - Function relies on pedaling input to transfer energy through the chain to the flywheel, which then aids rear-wheel rotation.