Surly track cogs are threaded the same as a BMX freewheel (1.37 x 24tpi 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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Absolute Black Singlespeed Cog Dubbed the best single
speed cog on the market. The Absolute Black Single Speed Cog has a unique narrow wide profile and perfect roundness for added added durability, strength and chain retention. Each tooth is wider ...
ALL-CITY TRACK COGGearing can be tough to nail
down, especially if you're using a single speed bike.Standard 1.37" x 24 TPI (English) threadMachined chromoly steel16T and lower have a solid design, 17T and higher feature weight-reducing cutouts
Use the Gates Carbon Drive CDX CenterTrack Belt
Drive Cogs to change your gear ration on your belt-driven bike. These cogs are offered either in a 9-spline version, Nexus/Alfine, or fixed version. Check the pull down menu to choose the ...