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Cryogenically treated 52100 chromium steel races
41 Spindle Interface Type SRAM/Truvativ GXP Weight 111 BB Shell Width (mm) 121 keyword search Fat Bike BB/Frame Interface BB121
Includes 3/8inch square to 1/2inch square adaptor and 3/8inch square to 1/4inch hex adaptor
Simple and easy to install
Surly Track Cog 3/32'' X 17t Silver MFPN=SCH020288S0100 Cryogenically treated 52100 chromium steelSurly Track Cog 3 32'' X 17t 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 17
