Shimano Track Cog

Shimano Track Cog Dura-ace
Shimano Track Cog Fixed Gear12-22T. Steel. Imported.
When you need every watt to go into the wheels, no name is as trustworthy as Dura-Ace. Their track cog threads onto standard 1.37″ x 24 TPI track hubs and is available in multiple sizes to give you the right gear for the job.
NJS approved. Compatible with 1/2″ x 1/8″ chains.