Surly Track Cog 1/8'' X 18t Silver ModelNumber=D1430 6 bolt disc brake interface

6 bolt disc brake interface and modern boost spacing

Maximum grip: Reinforced side lugs for improved grip in bends and solid center lugs for perfect brake transmission and grip off-road

AXS™ Pod features a “click and fire” two-button design that transforms the crucial act of rider inputs into a more personal experience for all your AXS™ controls

Misc Red Green and Black

Soft and comfortable synthetic liner

Surly Track Cog 1/8'' X 18t Silver ModelNumber=D1430 6 bolt disc brake interfaceSurly 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''