Precision CNC machined.2 dog type.L/H thread - 1.29 inch x 24TpiCromoly steelChrome platedLarger point of contact with hub for increased securityNote: General Fixed cog check: for correct fixed use, the fixed cog should Never move on the hub when pedal force is applied in both directions. i.e. if the cog moves, then something is wrong. Continued use with a fixed cog that moves will result in damage to the hub.
