Surly cogs are machined from heat-treated cro-mo steel and plated with a matte chrome finish so they are tough and long lasting.

Available in 1/8" width in sizes ranging from 15-19t. 17t and larger have holes for weight savings.

 

ⓘ All track cogs have 1.37"x24tpi threading. Any threaded cog can be used on any threaded track hub. 

specifications

• standard 1.37" x 24tpi threading

• color: silver