There are several types of surfboard fin systems available. Most surfboards today come with the removable, as opposed to glassed-in, type of fin. They are not all cross compatible. Most have boxes that are specific to that brand.

Since FCS is the most common fin system, most surfboards come with that type of fin box. FCS makes a huge selection of fins.

Futures are also popular and to a lesser extent, our personal favorite at surfing-gear.net, Lokbox.  Lokbox fins can be moved forward and back on the surfboard. This is a great feature for dialing in the best position on the surfboard, which is dependent on the rider and conditions of the day.

For fins with a softer edge try Pro-Tech. These fins are for those weary of being slashed by your fins...as most of us have.

Video tutorial of surfboard fin characteristics.



For all fins consider these design characteristics:

  • Depth - This is the fin's maximum height as measured from the bottom surface of the board. This is how far the fin goes in the water. The board's hold increases with more depth but generally makes it harder to turn as well. 3-4 inch depth is standard on tri-fins and longboard single fins typically have a depth of nine inches.

  • Template - The fins outline.

  • Base - The length of the fin where it joins the surfboard. Increasing length adds forward drive, but makes it harder to turn. Shortboard tri-fins usually have a 3.5-4.5 inch base, longboard single fins are about 6 inches.

  • Foil - The horizontal curve of the fin, measured from the front edge to trailing edge.

  • Rake - The distance betweent the trailing edge of the fin base and the fin tip. This is the swept back characteristic of the fin. Increasing rake increases traction.

  • Tip - The top third of the fin. More tip means more hold.

  • Flex - Stiff fins are faster but flexible fins are easier to turn.
       
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