NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 22t Silver Type_Brakes 15mm open end wrench for

15mm open end wrench for pedals

142 x 12mm thru-axle dropouts

Bag Size Class:X-Large (301-500 c

700c has clearance for a 50mm tire

Constructed of heavy-duty steel

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 22t Silver Type_Brakes 15mm open end wrench forSurly 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: 22