Surly Track Cog sprocket argentin

Our track cogs are designed for fixed gear applications and are compatible with most English, Italian and Japanese hubs, including the Surly New Track Hubs. The thread base is 7.4mm wide for maximum thread engagement while maintaining enough room for a track lockring to be threaded on the outside.

• Compatible with standard ISO-threaded (1.375" x 24tpi) hubs
• Machined from SCM415 Chromoly steel
• Heat-treated and chrome-plated
• Works with 3/32" or 1/8” chains
• Available in 13t–22t

Our cogs and lockrings use English threads (Cog —-1.375 ̋ X 24tpi), (Lockring —1.29 ̋ x 24t LH). Be sure the cog and lockring threads are compatible with your hub before installation. 3/32 ̋ chains should be used with 3/32 ̋ cogs, and 1/8 ̋ chains should be used with 1/8 ̋ cogs.Our cogs and lockrings are only intended to be used on fixed gear track hubs. Our cogs are not designed or intended for use on hubs that do not have a provision for a lockring.