SHIMANO CS-HG50 Alivio Bicycle Cassette (8-Speed, 11/30T, Silver) Cassette Body Type: Shimano 8, Cassette Cogs: 11,13,15,17,20,23,26,30, Cassette Color: Silver, Cassette/Cog Color: Silver Cassette/Cog Range: 11-30t, Chain Compatibility: 3/32-Inch, Cogs: 11,13,15,17,20,23,26,30 Drivetrain Spacing: Shimano/SRAM 8, Speeds: 8sp, Weight: 362 grams, Weight: 365 grams