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Rennen Aluminum Cassette Cog

  • 14T
  • 15T
  • 17T
  • 18T
  • 19T
  • 20T
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About This Product: Rennen Aluminum Cassette Cog

Rennen Aluminum Cassette Cog are manufactured with 7075-T6 Aluminum, stronger than the industry usual of 6061 Aluminum. Measuring in at only 3/16" so it won't rub your hubs, Rennen Cogs are also the one of the lightest cogs on the market, with the 16T coming in at only 17 grams! Available in a wide range of sizes for various speeds, Rennen Cogs are also Shimano Spline compatible and will work with 8 & 9 speed chains.


  • 13T: 0.35oz/10g
  • 14T: 0.42oz/12g
  • 15T: 0.49oz/14g
  • 16T: 0.60oz/17g
  • 17T: 0.74oz/21g
  • 18T: 0.84oz/24g

J&R Helpful Hint: Cogs and sprockets wear over time. We recommend replacement every 6 months due to chain wear.


  • FIT: Shimano compatible cassette cog (Redline, Bombshell, Rhythm, SINZ, Excess, OEM and more)
  • CHAIN FIT: 3/32" recommended (1/8" can be used as well)
  • MATERIAL: CNC machined from 7075-T6 aluminum in the USA