All-City 1/8" Track Cog Black

All-city's great value, standard track cog available in the most popular sizes. 16t and lower are solid, 17t and higher have cutouts Chromoly steel; CNC precision machined 1/8" width cogs; Threads are 1.37" x 24 tpi. Tooth Count: 12,13,14,15,16,17,18,19,2