Surly Track Cog 1/8'' X 17t Silver Model=Race Stem Bag Collection of 37 carefully selected

Collection of 37 carefully selected pieces from Birzman's portfolio of high performance tools and includes a tool box

hanger # 630

including Body Battery energy monitoring

Backed by Pedros lifetime warranty

Surly Track Cog 1/8'' X 17t Silver Model=Race Stem Bag Collection of 37 carefully selectedSurly 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 17 Size 1 8''