NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver rear-derailleur-mount-type_shimano-rear-direct-mount Clearance for 26 x 2

Clearance for 26 x 2

Rubber feet keep base stationary and add stability

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

Shimano RT10 (160 mm)

NEW Surly Cogs Track Cog Surly Track Cog 1/8'' X 17t Silver rear-derailleur-mount-type_shimano-rear-direct-mount Clearance for 26 x 2Surly 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