NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 17t Silver hydraulic-fluid-type_mineral-oil Crankset : All-City 612 Track

Crankset : All-City 612 Track Crank

Stylish construction of aluminum resistance unit

Cassette Body Type: Threaded Metric 30 x 1mm

400mm² platform area for maximum power transfer and greater pedal stability

- Steel backing plate

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 17t Silver hydraulic-fluid-type_mineral-oil Crankset : All-City 612 TrackSurly 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