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

6 bolt disc brake interface and modern boost spacing

Advanced SL fork

Misc Red Green and Black

Soft and comfortable synthetic liner

A kick wax designed for old

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''