The structure adopts ten single gears with the last two monobloc sprockets machined from solid. The intermediate sprockets as well as those in the last and penultimate positions are mod of Ergal AL 7075 T6 aluminum alloy with Hard Treatment (HT) anodization. This treatment increases hardness, smoothness and service life. The sprockets in the first and second positions, however, are made of alloy steel. 
To complete the set up, the spacers and lock ring are made in Ergal AL 7075 T6 aluminium alloy.