Surly Track Cog 1/8'' X 18t Silver CheckoutTitle=Schwalbe Green Marathon Tire - 20 x 1.50 To install

To install

14 mm diameter hardened steel shackle

Attachment for handlebar

Rear tire with 3D multi-angle knobs designed for cornering traction

Surly Track Cog 1/8'' X 18t Silver CheckoutTitle=Schwalbe Green Marathon Tire - 20 x 1.50 To installSurly 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 18 Size 1 8''