Surly Track Cog 1/8'' X 16t Silver Profile-17 Lightweight Velcro saddle mounting system

Lightweight Velcro saddle mounting system can be cinched down to ensure a quiet load

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Shared battery with all other SRAM AXS enabled components

Surly Track Cog 1/8'' X 16t Silver Profile-17 Lightweight Velcro saddle mounting systemSurly 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 16 Size 1 8''