Shimano Cassette 9 Speed Ratios

11-21 – 11.12.13.14.15.16.17.19.21 11-23 – 11.12.13.14.15.17.19.21.23 12-21 – 12.13.14.15.16.17.18.19.21 12-23 – 12.13.14.15.16.17.19.21.23 12-25 – 12.13.14.15.17.19.21.23.25…