NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 20t Silver Type_Rims This lock is constructed of

This lock is constructed of hardened steel and provides high security

Bike Mount Type: Top Tube

completely re-engineered for 1x systems and the innovative X-Sync 2 chainrings

6 Weight 614g 632g 674g

NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 20t Silver Type_Rims This lock is constructed ofSurly 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