The range of Brembo discs for Superbike
Every rider can choose between 338.5 mm diameter discs or 336 mm ones. The larger diameter means that more pressure can be exerted, but it also weighs more. For each option, the riders can choose from four different thicknesses from a minimum of 6.5 mm up to 7.1 mm.
Carbon has been barred from Superbike since 1994, to limit costs; the discs, in fact, are made of steel, even though regulations permit the use of carbon as long as it doesn't account for more than 2.1% of the total disc weight. Alloys containing beryllium are also banned.