NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 20t Silver variant-size-68x127 5mm thick (compared to the

5mm thick (compared to the 5mm of Supple Bar tape)

Nylon Hardware

smooth gear progression and the simplicity of SRAM eTap

Operates with Shimano Di2 for digital electronic shifting

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 20t Silver variant-size-68x127 5mm thick (compared to theSurly 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: 20