Surly Track Cog 1/8 X 18t Silver MFPN=1-LED-HMOUNT-V604 } High performance disc pads

} High performance disc pads from the most trusted name in aftermarket brake pads

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}DT Swiss E 512 Rim - 29" Disc Black 32H

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Surly Track Cog 1/8 X 18t Silver MFPN=1-LED-HMOUNT-V604 } High performance disc padsSurly Track Cog 1 8 X 18t Silver. Surly 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 TECH SPECS Tooth Count 18