Surly Track Cog 1/8'' X 17t Silver Model=Race Stem Bag }Park Tool PH-1

}Park Tool PH-1

The XM 1700 SPLINE wheels were designed to dominate the mountain

Model Campagnolo Compound/Backing Green/Steel

hanger # 630

including Body Battery energy monitoring

Surly Track Cog 1/8'' X 17t Silver Model=Race Stem Bag }Park Tool PH-1Surly 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''