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Road    Cassette Lockrings, Cogs & Spacers

Shimano Cassette Cog 10sp 12T

Standard OE replacement cog for a 7800, 7900, 6700 and 6600 10-speed Shimano cassette with a 12t cog. Inside edge is knurled to grip on the lockring. Treated steel is incredibly durable.


  • OE 7800 replacement part
  • Cut and plated steel
  • Profiled teeth
  • Requires 12t lockring
  • Made in Japan
  • Works on 12-21, 12-23, 12-25 and 12-27
  • Can also be used in 2nd position

    Please note: only replaces 12t cog on CS-7800, 7900, 6700 and CS-6600 cassettes. This cog can't be used to retrofit a cassette with a 11t or 13 first position cog.

  • $4.88
    Reg Price $18.00
    Item #: 560161 Weight: 10g
    Item is in stock