NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 19t Silver rearder_medcage Lever provides greater flexibility and

Lever provides greater flexibility and an action-optimized cockpit layout

Natch tubing

WTB ST i25 TCS 2

Petroleum Based: Yes

Compatible with microSHIFT ADVENT 9-speed drivetrains only

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 19t Silver rearder_medcage Lever provides greater flexibility andSurly 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: 19