Super B Rear Derailleur Hanger Extension


The device extends the position of road derailleur to run a wide-range mountain bike style cassette. Size: 32 x 36mm       


  • Designed for use with 10 or 11-speed 11-36t and 11-40t cassettes..  
  • Optimised for Shimano 10/11 speed derailleurs and shifters but will work with 9 speed and SRAM and Campagnolo groups.  Please note that 11-36t is the max cassette for Campagnolo groups. 
  • Only works with standard hangers.  
  • Double chainrings will only work with medium cage derailleurs.
  • Will not work with triples.
  • Not compatible with direct mount native frames.
  • If converting a Shimano road drivetrain to 1x, you may need a chain guide.
  • 2x chainring setups are only compatible with med cage derailleurs.
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This product is: A regular item

Regular Shipping - This is a small product that can be easily shipped using standard AusPost satchels.

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10s Cassette Compatibility:

  • 11-32: Not Required (GS medium cage rear derailleur works) 
  • 11-34: Single or Double Chainring
  • 11-36: Single or Double Chainring (front rings can be no more than 14 teeth different)
  • 11-40: Single or Double Chainring (front rings can be no more than 10 teeth different)
  • 11-42: Not Supported

11-speed cassette compatibility:

  • 11-32: Not Required (GS medium cage rear derailleur works)
  • 11-36: Single or double chainrings. 
  • 11-40:  Single and doubles as long as the chainrings are no more than 14 teeth different.
  • 11-42 and 10-42 cassettes are not compatible.

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