Surly
Track Cog 3/32 15t
Surly Track Cog 3/32 15t
Surly track cogs are made from 415 hardened chromoly steel and 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.
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