NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 22t Silver Type_Brakes 700c has clearance for a

700c has clearance for a 50mm tire

5mm domes and 2 x 4

Carbon fiber and magnesium construction keeps the weight low

Constructed of heavy-duty steel

Battery: Li-ion

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 22t Silver Type_Brakes 700c has clearance for aSurly 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