Surly Track Cog 1/8'' X 17t Silver Model=Race Stem Bag hanger # 630

hanger # 630

– E-bike suitable through the use of special additives

3 is the perfect way to upgrade your home shop - a stable way to hold nearly any bike off the ground for adjustments cleaning and repair

}Park Tool PH-1

Surly Track Cog 1/8'' X 17t Silver Model=Race Stem Bag hanger # 630Surly 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 Size 1 8''