Campagnolo Ultra-Drive 10-Speed 16A Cog Review Posted on July 12, 2018November 9, 2018 By ArchSeaLionPosted in Drivetrain ComponentsTagged Campagnolo, Cycling, Outdoor Recreation, Parts & Components, Sports & Outdoors This fits your . Make sure this fits by entering your model number. Z 16A sprocket. 10S-161 16T COG 10S 16A COG