cassette lockrings

Original Campagnolo replacement cassette lockrings. **There are four types:** * 9/10 speed compatible (all 9/10 speed cassettes from 2000 onwards plus Record and Chorus cassettes from 1999) * 11 speed compatible (all 11 speed cassettes from 2009 onwards) * 12 speed compatible (all 12 speed cassettes from 2019 onwards) * 13 speed compatible (all 13 speed cassettes from 2020 onwards) **Please also check what tooth your first sprocket is:** * Select 11T - for 11 tooth first sprocket * Select 12T - for 12 or 13 tooth first sprocket **FEATURES:** * Original Campagnolo Spare part **CAMPAGNOLO PART NUMBER** * CS-501 (9/10x, 11T) * CS-401 (CPS45 9/10x, 12T) * CS-111 ( 11x, 11T) * CS-112 (11x, 12T) * CS-511 (12x) * AC21-N3W (13x 11T)