Surly Track Cog 1/8 X 19t Silver MFPN=12080111 Grandma Bernie always made sure

Grandma Bernie always made sure we were cozy and happy

Disc brakes can make noise in some conditions

The liquid evaporates completely after about 10 minutes

Pattern: Light Cahill

Surly Track Cog 1/8 X 19t Silver MFPN=12080111 Grandma Bernie always made sureSurly Track Cog 1 8 X 19t 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 19