We offer wide-range 9 speed silver cassettes that come with either an 11 or 12 tooth top gear, made by Shimano. They index and friction shift great. You need this tool to remove and install it. (Shimano 8 speed cassettes are now here) 11-13-15-17-19-21-24-28 (hg51) discontinued 11-13-15-17-19-21-24-28-32 (hg201) discontinued 11-13-15-17-20-23-26-30-34 (hg201) discontinued 11-12-13-14-16-18-21-24-28 (hg400) 11-12-14-16-18-21-24-28-32 (hg400) 11-13-15-17-20-23-26-30-34 (hg400) 11-13-15-17-20-23-26-30-36 (hg400) 12-14-16-18-21-24-28-32-36 (hg400) 11-12-14-16-18-21-24-28-32 (deore xt m770) 11-13-15-17-20-23-26-30-34T(deore xt m770) Check out our gear inch calculator if you really want to fine tune your gearing.