Surly Track Cog 1/8'' X 17t Silver MFPN=080A920IKC001 Integrated spring clip is convenient

Integrated spring clip is convenient for securing lighter weight cargo

} Run with confidence

} SRS technology for a more precise shifting

M 502 RimTubeless-Ready Alloy rim (tape valves and sealant sold separately)

}Vittoria Randonneur Reflect Tire - 700 x 40 Clincher Wire Black

Surly Track Cog 1/8'' X 17t Silver MFPN=080A920IKC001 Integrated spring clip is convenientSurly 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''