NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 20t Silver fpbf Cassette Cogs: 11-13-15-17-20-23-26-30-34

Cassette Cogs: 11-13-15-17-20-23-26-30-34

primarily used in the lower price products like the 370 hubs

SM fits riders 5'4" to 5'9"

keyword search: PPL1

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 20t Silver fpbf Cassette Cogs: 11-13-15-17-20-23-26-30-34Surly 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: 20