The Campagnolo Veloce 9-speed cassette has been developed based on the Ultra Drive (UD) technology. This special conduction on the sprockets provides extremely smooth, direct and quiet shifting. The steel sprockets have a nickel-chrome finish with a long lifespan and are lightweight. Cassette with Ultra Drive for more accurate and quieter shifting. Durable and not expensive! For 9-speed Campagnolo derailleurs.