ZF sprockets are among the highest quality and most technically advanced sprockets in the world. The secret is based on the combination of the durability of steel and the lightness of duralumin. This aluminum alloy is characterized by enormous strength, stability and low weight. The tensile strength is approximately 11 times that of pure aluminum. With polymerization, duralumin almost reaches the strength of steel. As a result, lower weight and higher strength was implemented. The milling in the base of the pinion tooth ensures optimal self-cleaning. These cuts ensure that dirt cannot stick between the teeth and therefore wear the chain and sprocket not so quickly. The lifespan of ZF-Dual sprockets is approximately three times longer than pure aluminum sprockets and 50% lighter than steel sprockets. More suitable for road and off-road.