Description
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
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