The Shimano XTR CS-M980 Cassette is built to help you get the most out of every ride. Featuring Shimano's Dyna-Sys, the XTR CS-M980 is a 10 speed cassette that gives you high end performance in a lightweight package. The teeth of the XTR CS-M980 has been designed to provide some of the smoothest and quickest shifting possible while the nickel finish ensures a long life for your cassette. The sprocket sizes are 11-13-15-17-19-21-24-28-32-36. This cassette features an 11-36 ratio and includes a lockring and the technical manual.