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Replacement cog for 11-speed SRAM and SunRace cassettes.

  • Remove the 17 and 19t cogs and replace them with the 18t for GC49 conversions.

  • These are specifically designed for use with SRAM and SunRace cassettes. The clocking, or rotational orientation, between SRAM and Shimano cassettes are much different so optimal shifting cannot be achieved unless the design is optimized for each separately.



SRAM 11 speed cassettes

  • NX 11-42 (PG-1130)

SunRace 11-speed cassettes

  • CSMS8 (11-42)
  • CSMS7 (11-42)
  • CSMX8 (11-42)


Related Product

Cassette Cog

Tech Specs

Weight: 22g
Width: 1.6mm
Material: black oxide steel
Made in the USA


  WARNING Handling this product will expose you to chemicals, including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For further information go to​

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