- DUAL USE SS Cog or 6-bolt Disc fixed cog
- Fits Shimano cassette bodies or 6-Bolt Disc mounts
- Great fixed gear conversion for 6-Bolt disc hubs
- Removable 6B disc mount
- ZERO-FLEX base design
Origin8 Ultim8 Single Speed Cassette Cog w/ 6b Disc Mount in three different sizes