The Sram PG1070 10 Speed Cassette is a semi-spidered design maintains a high level of shifting performance with a matched cassette/chain combination that runs near silent. To help you in the toughest climbs it is now available in the new 11-32 ratio. Sram PG1070 10 Speed Cassette Features Technology: Power Glide Gear Ratios: 11-23, 11-25, 11-26, 11-28, 12-25, 12-26, 12-27 Speeds: 10 Recommended Chain: PC-1090R, PC-1090, PC-1070, PC-1050, PC-1030 Sprockets on Spider: 3 Lock Ring Material: Forged 7000 Series Alloy, Anodized, Laser Etched Sprocket Material: Heat treated steel / Blast Silver