![One-ramp sprocket for Shimano Hy0perglide cassette](http://cdn-0.sheldonbrown.com/blog/wp-content/uploads/2016/03/15T_one-ramp.gif)
One-ramp sprocket for Shimano Hyperglide cassette
![Two-ramp 15T sprocket for Shimano Hyperglide cassette](http://cdn-0.sheldonbrown.com/blog/wp-content/uploads/2016/03/15T_2-ramps.gif)
Two-ramp 15T sprocket for Shimano Hyperglide cassette
Major update to our page on Shimano and Shimano-compatible 9-speed cassettes. We’ve fixed broken links from when manufacturers updated *their* Web pages, and updated information on availability.