Sustainable Single Tab Rapid (medium)
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Sustainable Single Tab Rapid (medium)


  • RIVER SURFING – Center fin in a thruster setup specially designed for river surfing or the citywave
  • MADE IN GERMANY – Developed and produced in Germany
  • COMPATIBLE – Fits with any surfboard with Future single tab plug system
  • DURABLE – High-quality recycled fiberglass reinforced plastic – Sourced in Germany

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The Eisbach Riders knubster center keel fin can be used as center fin enhancement in a quad-set-up or as the third fin in a thruster configuration, especially for river surfing or the citywave. The fin design is suited for any waves as well as for river surfing.


  • Configuration: Rapid – 2-fin setup + knubster center fin
  • Color: black
  • Material: Recycled Fiberglass reinforced plastic – Sourced and made in Germany
  • System: Future plug system
  • Size: medium – 2.6”
    • Height: 6.60 cm (2.6”)
    • Length: 10.60 cm (4.2”)


1x Knubster Center Keel Fin

Additional information


Black, White