Slingshot Extension Cog

aluminium. MTB.

A bolt-on upgrade for your Shimano cassette.

The Funn Slingshot Extension Cog allows you to expand your 11 speed Shimano 11T-42T cassette for an extra helping hand on those big climbs.

The kit comes with 18 and 50T cogs to convert your cassette, allowing you to drop a 50T in place of your existing 42T cog.

It’s ideal for 1X conversions.


  • AL7075 Full CNC
  • For 11 speed Shimano 11T-42T cassette
  • Ideal for 1X conversions
  • Contains 18T and 50T cogs
  • Red / Blue / Black
  • 98g