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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The All-City 612 Track Crank is a high-quality,
affordable, and stylish crankset that is a great choice for your track, fixie, or single speed bike. Includes matching 46 tooth track chainring Cold forged for maximum strength and durability, stiff and ...
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
MKS Track chain tensioners, perfect for adjusting chain
tension on your fixed gear or single speed bike. Fits 5mm width dropouts Includes two tensioners Includes hardware and tools Unit of Sale: Pair Fits: 10mm Axle Intended Use: Track, Fixed Gear, ...