Surly Track Cog 1/8'' X 19t Silver MFPN=DROPOUT-142 bib strap with perforations for

bib strap with perforations for increased breathability

25 ISO 406 Bead Wire Tread/Sidewall Color Bk/Blk PSI 100 Weight (Grams) 210 TPI 60 Durometer Features Reflective Sidewall No

Platform dimensions: 100x100x16

model Trail Boss TCS Tough Fast Rolling SG1 IP+ E50 size 29" width 2

Surly Track Cog 1/8'' X 19t Silver MFPN=DROPOUT-142 bib strap with perforations forSurly 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 19 Size 1 8''