NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver rear-derailleur-mount-type_shimano-rear-direct-mount spoke:14/15/14g

spoke:14/15/14g

Efficient SPD step-in design on one side with a flat platform on the other

It is water resistant and made to last

SUPER SLR design makes use of a friction-reducing mechanism lever and cable that improves response and modulation

1” tires

NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver rear-derailleur-mount-type_shimano-rear-direct-mount spoke:14/15/14gSurly 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