Surly Track Cog 3/32'' X 17t Silver MFPN=00.7018.209.002 Bolt length is laser engraved

Bolt length is laser engraved onto the bolt head for easy length identification

(mm) 17 Manufacturer Number 3803 Material Steel Thickness 10

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This light is an integral part of daily commutes or road rides and for staying safe day or night

Precision machined anodized 6061 T6 aluminum

Surly Track Cog 3/32'' X 17t Silver MFPN=00.7018.209.002 Bolt length is laser engravedSurly Track Cog 3 32'' X 17t Silver. Surly 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 TECH SPECS Tooth Count 17