Fidanza Nodular Iron Flywheels are an inexpensive improvement over stock cast iron flywheels. The density of Nodular iron compared to cast iron allows for better distribution, due to nodule graphite particles as opposed to flakes. Particles provide better alignment and magnesium content is increased, resulting in greater strength than a standard casting. Fidanza Flywheels nodular iron construction allows for limited resurfacing for long-term use. .