Wolf Tooth 16 Tooth Cassette Cog

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Designed for use with Wolf Tooth's 40t or 42t extender cogs.  When you add an extender cog to your 11-36 10-speed cassette, you will need to remove either the 15t or 17t cogs.  This creates a large undesirable jump between gears.  The 16t cog is designed to replace both the 15t and 17t cogs for a smooth transition and better shifting between gears.  


  • Shimano 10 speed cassettes.
    • XT 11-36t (CS-M771)
    • XTR 11-36t (CS-M980)
    • Other 11-36t Shimano cassettes may work HOWEVER MODIFICATION MAY BE REQUIRED. Rivets holding the 17t cog may have to be drilled.  
  • SRAM 10 speed cassettes
    • PG 1030, 1050, and 1070: 11-36 and 12-36 
    • X0 11-36t(XG - 1080) Remove the 14t rather than the 17t.


  • Remove both the 15t and 17t cogs, and the spacer between them.
  • For Shimano cassettes: he two dots will line up on the wide spline. 
  • For SRAM cassettes: The single dot will line up on the spline.  

To purchase the Wolf Tooth GC cog, Click here. 


SKU 812719020886
Brand Wolf Tooth