SHIMANO XT CS-M771-10 MTB Bike Cassette (11-36T, 10 Speed, New) KCSM77110136 Dyna-Sys Components 8 rings on Spider (3+3 structure) Alloy lock ring; Made in Japan HyperGlide Sprockets 10-speed cassette includes cogs 11-13-15-17-19-21-24-28-32-36T