Kelly Slater's signature fin designed for driving hard off the bottom and performing longer arc turns on open face waves.


Currently Out of Stock

We can send you an email when this is back in stock. Just put your email address in below and you'll know as soon as it's in.

Please note, the k3.1 quad sets we have in stock now are blue, not yellow as pictured.

The FCS K3 fin template is a bit deeper and features slightly less base area than the K2.1 with a smaller more raked tip. This will allow the K3's to provide drive and the ability to draw out longer arcing turns. With a rigid base combined with a tapered flexible tip for quick rail transitions. A great fin for long drawn out turns and predictable hold for any surfer between 65-80kg.

How Many fins?

This is supplied as a set of four fins.


Front fins

  • Height: 4.41 in / 112mm
  • Base: 4.28 in / 109mm
  • Area: 14.22 sq in / 91.72 sq cm
  • Sweep: 31°
  • Foil: 50/50


  • Height: 4.41 in, 11.20 cm
  • Base: 4.28 in, 10.90 cm
  • Area: 14.22 sq in, 91.72 sq cm
  • Sweep: 31.0°
  • Foil: 50/50

Fin Size:

Komunity give each fin a size rating, each size has a recommended rider weight range, so you can easily work out whether a set of fins is going to be a good size for you.

  • Medium fins are designed for a rider weight range of: 65kg - 80kg



A Honeycomb core fin is lighter than a glass flex and not as stiff as a Honeycomb with Carbon construction, if you prefer a more traditional feel but want a lightweight option, go for Honeycomb.

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