Campagnolo sprockets are renowned for their machining quality, reliability and smooth gear changes. They are designed to work exclusively with Campagnolo-specific drivetrains and freewheel bodies, ensuring perfect compatibility but limiting compatibility with other brands. From the old 5- to 8-speed screw-on sprockets to the modern 9-, 10-, 11-, 12- and even 13-speed (Ekar) cassettes, the brand has constantly improved its systems.