NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver groupset-speeds-11 and installs and adjusts independently

and installs and adjusts independently of the derailleur itself

- Adjustable quick-attach elastic for mounting

- Nickel plated finish for corrosion resistance

Battery: Li0Ion

Compatible with LOOK KEO pedals

NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver groupset-speeds-11 and installs and adjusts independentlySurly 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