NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 15t Silver brand_garmin Its progressive trail geometry is

Its progressive trail geometry is stable on descents and technical sections

but can be retrofitted with the Trail Doc kit

Crown Race: 40

- Advanced shifting performance provides the confidence to enjoy any trail

Labeled Size: 700 x 37

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 15t Silver brand_garmin Its progressive trail geometry isSurly 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 Tooth Count: 15