11-speed Sram PG-1130 cassette, with 11-42 teeth and PowerGlide II τεχνο technology that provides extremely smooth displacement between the gears. Suggested chain: PC 1130 Compatibility: SRAM Rival® 1, SRAM Rival® 22, SRAM PC 1170, SRAM PC 1130 Tooth sizes: 11-42t: 11,13,15,17,19,22,25,28,32,36,42