Affordable versions of SRAM's 11-speed cassette range. Shift performance is on par with higher end offerings with minimal additional weight. SRAM 10 and 11 speed cassettes with 11 tooth cogs have the smallest cog located behind the cassette in the packaging Compatible with all SRAM 11-speed chains Optimized gear steps across entire range No special hub or freehub body needed Easily modify mountain or adventure road bikes to 1x11 wide-range gearing Equally effective for 2 x 11 drive trains Cassette Body Type: Shimano Dynasys 11 Speed Mountain , Shimano/SRAM 8, 9, 10 Speed Cassette Cogs: 11-13-15-17-19-22-25-28-32-36-42