Surly Track Cog 1/8'' X 22t Silver. Surly track cogs are threaded the same as a BMX freewheel (1.375 x 24 tpi right-hand threads). This means that they will fit on single-speed rear hubs as well as BMX freewheel hubs but this application is not recommended. Track cogs are meant to work on track hubs only.
415 hardened chromoly steel
1.375" x 24 tpi
Photo for color and material reference only
- TECH SPECS
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