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ZF pignons are among the very high quality and technically more advanced pignons in the world. The secret is based on the combination of the durability of steel and the lightness of the duralluminum. This aluminum alloy is characterized by enormous resistance, seal and reduced weight. The resistance to traction is about 11 times that of pure aluminum. With polymerization, the duralle reaches almost the strength of the steel. Consequently, a higher weight and a higher resistance has been implemented. The milling in the base of the pigno tooth guarantees an optimal self -pipe. These cuts ensure that the dirt cannot enter the teeth and therefore the chain and the pigno are not so fast. The duration of the ZF-Dual pignons is about three times longer than pure aluminum pignons and 50% lighter t.