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The 102BCD chainring was made specifically for the XTR M960 crankset
Machined aluminum cup
rocky terrain and in bike parks
elastic jersey to ensure great fit
Surly Track Cog 1/8'' X 18t Silver Model-Box Two The 102BCD chainring was madeSurly 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 18 Size 1 8''
