Dyna-Sys Components 6 rings on Spider (3+3 structure) Alloy lock ring HyperGlide Sprockets 10-speed cassette includes cogs 11-12-14-16-18-20-22-25-28-32T Shimano XT M771 10-Speed Cassettes feature optimized tooth profiles for HG-X chain and Shadow rear derailleur. Item Specifications Intended Use Mountain Cassette Spacing Shim/SRAM MTN 10 Cassette Body Type Shimano 9/10/SRAM Cassette Cogs 11-32 Number of Speeds 10 Chain Compatibility Dyna-Sys Range 11-32