Heat-treated chrome-plated steel construction: Delivers exceptional strength and longevity for demanding track and fixed gear use
Precision machined threads: Ensures secure installation and consistent engagement on standard 1.375 x 24 TPI track hubs
Multiple tooth options (15, 16, 17, 18, 19t): Allows riders to fine-tune gear ratios for optimal performance on velodrome or city streets
Matte silver finish: Provides corrosion resistance and a clean, professional appearance
Deep threading design: Enhances durability and power transfer under high torque
Summarized by Shop
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.
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