Surly track cog
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" or 3/32" widths in sizes ranging from 14-21t.
• standard 1.370" x 24tpi English threading
• 17t and larger have holes for weight savings
• color: silver