NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 20t Silver fpbf SM fits riders 5'4" to

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

Chainline/Hub Compatibility: 157 Super Boost Hubs

Pair it with our lavender-colored neck gaiter for full-on pastel coverage

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

53cm : 5'8" - 5'10"

NEW Surly Cogs Track Cog Surly Track Cog 3/32'' X 20t Silver fpbf SM fits riders 5'4" toSurly 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